Cirrus puts the PR description and commit message in environment
variables.
These messages tend to have non ASCII characters sometimes (like
emojis), which triggers a Gradle bug (gradle/gradle#3117) resulting
in Gradle crashing without a helpful error message.

The real solution to this problem should be fixing the Gradle bug.
The better workaround on the Flutter side would be to set a UTF8 locale
on the Cirrus machine, but I have yet figured out how to do it.
For now to avoid more people from hitting this I'm working around by
temporarily unsetting the Cirrus environment variables with the PR
description and commit message.

A non ASCII character to make sure it works: 😄

https://github.com/flutter/engine/compare/134b65ec6034...e52287a1b557

git log 134b65ec6034cdd9823ed5631df248d27870306e..e52287a1b5572c73b19d085ccbe404f0aeddb5f6 --no-merges --oneline
e52287a1b Fix typo clas -> class (flutter/engine#7360)
80c19b6b1 Roll src/third_party/skia 8966b55644c2..3b7e65107f67 (3 commits) (flutter/engine#7361)
beed0c455 Roll src/third_party/skia fdde2926df92..8966b55644c2 (1 commits) (flutter/engine#7359)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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the roller if necessary.

* Ensure all errors thrown by image providers can be caught by developers.

Add an `onError` parameter to the ImageCache.putIfAbsent method.
In the event that an error is thrown when resolving an image, catch if
this parameter is provided. Use the onError parameter to ensure that all
errors thrown are forwarded to the ImageStream error channel instead of
directly into the void.

https://github.com/flutter/engine/compare/2940812ab26a...134b65ec6034

git log 2940812ab26a9dac772459888f1e79389bedb977..134b65ec6034cdd9823ed5631df248d27870306e --no-merges --oneline
134b65ec6 Roll src/third_party/skia aae6ae39a356..fdde2926df92 (1 commits) (flutter/engine#7358)
f97edf2ac Roll src/third_party/skia 96345a23dfa9..aae6ae39a356 (1 commits) (flutter/engine#7357)
d051c47e5 Roll src/third_party/skia bc84adceaada..96345a23dfa9 (2 commits) (flutter/engine#7356)
15fcba4d8 Roll src/third_party/skia d0d5bb8c8500..bc84adceaada (6 commits) (flutter/engine#7355)
4d353de49 Preparing to remove SK_SUPPORT_LEGACY_PAINT_TEXTMEASURE (flutter/engine#7354)
54d7c4256 Paint all backgrounds first to prevent overlap (flutter/engine#7287)
0ad16dd10 Roll src/third_party/skia 279b65ddb5a3..d0d5bb8c8500 (12 commits) (flutter/engine#7353)
8cca33aea Give more control over when dynamic patches get downloaded and installed. (flutter/engine#7327)
2d291c7ff Roll src/third_party/skia 8f37ce5b9f2c..279b65ddb5a3 (6 commits) (flutter/engine#7350)

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* Add didSendFirstFrameEvent service extension.

2940812ab Roll src/third_party/skia 1409ac718693..8f37ce5b9f2c (2 commits) (flutter/engine#7349) (#25978)

https://github.com/flutter/engine/compare/b1a9a6e79474...844c3274e6a1

git log b1a9a6e7947492b27c21688104d2d006d583094e..844c3274e6a1cd5a4651c46d26761b76ea837b34 --no-merges --oneline
844c3274e Roll src/third_party/skia 22451ccae544..1409ac718693 (2 commits) (flutter/engine#7348)
8ae205ccf Roll src/third_party/skia db0fdfbf107d..22451ccae544 (1 commits) (flutter/engine#7347)
e04cb414c Roll src/third_party/skia 247f03baeed9..db0fdfbf107d (1 commits) (flutter/engine#7345)
5f5316871 Roll src/third_party/skia 4f050fb81955..247f03baeed9 (1 commits) (flutter/engine#7344)
0e4a1afc3 Roll src/third_party/skia 8f42e2467cd9..4f050fb81955 (1 commits) (flutter/engine#7343)
a19b78ab6 Roll src/third_party/skia 9bc33b963844..8f42e2467cd9 (1 commits) (flutter/engine#7342)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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https://github.com/flutter/engine/compare/995e3247fe50...b1a9a6e79474

git log 995e3247fe500ff6e9981bd6e2409191c4f9a32a..b1a9a6e7947492b27c21688104d2d006d583094e --no-merges --oneline
b1a9a6e79 Roll src/third_party/skia 61b3d1d00057..9bc33b963844 (1 commits) (flutter/engine#7341)
571bf5c1e Roll src/third_party/skia 7b0f0149474a..61b3d1d00057 (1 commits) (flutter/engine#7340)
193cf3792 Roll src/third_party/skia 197b1f7900a2..7b0f0149474a (1 commits) (flutter/engine#7334)
8b35c97c1 Roll src/third_party/skia 0c1592291580..197b1f7900a2 (2 commits) (flutter/engine#7333)
544e5bcd2 Roll src/third_party/skia 3b0a332fd970..0c1592291580 (1 commits) (flutter/engine#7332)
d2eb6efeb Roll src/third_party/skia a5d2a9486fed..3b0a332fd970 (1 commits) (flutter/engine#7331)
e2ca868c3 Roll src/third_party/skia 3dc21675b05a..a5d2a9486fed (1 commits) (flutter/engine#7330)
cdc7cc8d3 Roll src/third_party/skia 739b760deaa6..3dc21675b05a (1 commits) (flutter/engine#7329)
e548f12e4 Roll src/third_party/skia aec8c7e280cb..739b760deaa6 (1 commits) (flutter/engine#7328)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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the roller if necessary.

https://github.com/flutter/engine/compare/1bd9d41f8990...995e3247fe50

git log 1bd9d41f8990..995e3247fe50 --no-merges --oneline
995e3247f Roll src/third_party/skia f3e6b90461e4..aec8c7e280cb (1 commits) (flutter/engine#7326)
6f763fbad Minor refactoring of dynamic patching code. (flutter/engine#7325)
868dc047b Support loading flutter assets from dynamic patch (flutter/engine#7308)

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See https://github.com/flutter/flutter/issues/25855

https://github.com/flutter/engine/compare/f0a1d6f91d93...1bd9d41f8990

git log f0a1d6f91d93..1bd9d41f8990 --no-merges --oneline
1bd9d41f8 Roll src/third_party/skia 51eaa79d19b8..f3e6b90461e4 (5 commits) (flutter/engine#7323)
bf863786c Roll buildroot to pick up changes since the last roll: (flutter/engine#7322)
c716a21a2 Roll src/third_party/skia 7561dba7c145..51eaa79d19b8 (3 commits) (flutter/engine#7321)
189662feb Roll src/third_party/skia 3e7ba8fa7e7f..7561dba7c145 (1 commits) (flutter/engine#7320)
db5214d3d Roll src/third_party/skia acc763e8795c..3e7ba8fa7e7f (1 commits) (flutter/engine#7319)
0a0d61323 Changes since last dart roll: (flutter/engine#7316)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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```
f0a1d6f91 Roll src/third_party/skia 487132b82826..acc763e8795c (1 commits) (#7318)
f0dd6436c Recreate the overlay rendering surfaces if the GrContext was changed. (#7317)
245317a62  Reland "Only reject gestures to embedded UIViews when the framework sa (#7315)
be69b07cc Roll src/third_party/skia d2fa2eb59f2d..487132b82826 (1 commits) (#7314)
732ea7669 Allow dynamic patches without a patch number. (#7309)
20ee4e3e9 Revert "Only reject gestures to embedded UIViews when the framework says so. (#7307)" (#7313)
28e152f7e Roll src/third_party/skia cae020ae5f5f..d2fa2eb59f2d (3 commits) (#7312)
7c65290da Roll src/third_party/skia 31c1bf89657f..cae020ae5f5f (1 commits) (#7311)
180d8a7d9 Roll src/third_party/skia f6e963ef91c2..31c1bf89657f (1 commits) (#7310)
cc9c6702d Only reject gestures to embedded UIViews when the framework says so. (#7307)
2fb2b2729 Roll src/third_party/skia 3605fde88b2a..f6e963ef91c2 (1 commits) (#7306)
```

Unique patch numbers are mainly useful for canary and A-B testing, but otherwise complicate things and can now be omitted.

* Collect devfs stats for better analytics

* Fix fields initialization

* Fix lints

flutter/engine#7307 changes the engine side of embedded UIView to only
reject gestures when the framework sends a `rejectGesture` message, so
that gesture resolution can done after a touch sequence has ended (see
PR description for flutter/engine#7307 for more details).

This change makes the framework send a `rejectGesture` message to the
engine when a UiKitView rejects a gesture.

I'm planning to land this PR before the engine side change, so right now
it swallows the exception thrown if there is no engine implementation
for `rejectGesture` (which keeps us with the current behavior). After
this change lands I'll land the engine PR, and then clean up the part
that swallows the exception.

https://github.com/flutter/engine/compare/e75fad7ccead...9daf5c8d213a

git log e75fad7ccead..9daf5c8d213a --no-merges --oneline
9daf5c8d2 Roll src/third_party/skia f78b7ea945e5..3605fde88b2a (1 commits) (flutter/engine#7305)
798e96d9b Roll src/third_party/skia 212e9060ed29..f78b7ea945e5 (1 commits) (flutter/engine#7304)
7b379da03 Roll src/third_party/skia 5d77c200a8d9..212e9060ed29 (1 commits) (flutter/engine#7303)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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If the roll is causing failures, please contact the current sheriff (liyuqian@google.com), and stop
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https://github.com/flutter/engine/compare/d8c5ec0e11b5...e75fad7ccead

git log d8c5ec0e11b5..e75fad7ccead --no-merges --oneline
e75fad7cc Roll src/third_party/skia 2772ea397e04..5d77c200a8d9 (1 commits) (flutter/engine#7302)
a64dd4b97 Roll src/third_party/skia 088b74e51314..2772ea397e04 (1 commits) (flutter/engine#7301)
4e9fb504e Roll src/third_party/skia 8be4b02b4c72..088b74e51314 (1 commits) (flutter/engine#7300)
787caecc7 Roll src/third_party/skia 481dd46cc368..8be4b02b4c72 (1 commits) (flutter/engine#7299)
c39589de6 Roll src/third_party/skia dc5863c4d665..481dd46cc368 (1 commits) (flutter/engine#7298)

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* Include cursor in textfield intrinsic width measurement

* Add cursorWidth assertion, add comment about assumed cursor width, and test null stepWidth

https://github.com/flutter/engine/compare/215ca1560088...d8c5ec0e11b5

git log 215ca1560088..d8c5ec0e11b5 --no-merges --oneline
d8c5ec0e1 Roll src/third_party/skia f16825ed3c71..dc5863c4d665 (1 commits) (flutter/engine#7297)
efb8a3f07 Roll src/third_party/skia 945a56644728..f16825ed3c71 (1 commits) (flutter/engine#7296)
67150a535 Roll src/third_party/skia 28bd882a1e40..945a56644728 (2 commits) (flutter/engine#7295)
3705a1ed3 Roll src/third_party/skia ea8900e74ea7..28bd882a1e40 (1 commits) (flutter/engine#7294)
943ecfc75 Roll src/third_party/skia 13654b20ce5b..ea8900e74ea7 (1 commits) (flutter/engine#7293)
7b12ae241 Roll src/third_party/skia 12a6d452b126..13654b20ce5b (1 commits) (flutter/engine#7292)
1fe7e1fde Roll src/third_party/skia c983480b117f..12a6d452b126 (1 commits) (flutter/engine#7291)
a8b0d263c Roll src/third_party/skia 2e40d9886402..c983480b117f (1 commits) (flutter/engine#7290)
c64f971e3 Roll src/third_party/skia 98a4e4a4135b..2e40d9886402 (1 commits) (flutter/engine#7289)
65420c264 Roll src/third_party/skia 2a0967383087..98a4e4a4135b (1 commits) (flutter/engine#7288)
770536ab6 Only overflow the cache for one required frame (flutter/engine#7048)
b6880bbc9 Roll src/third_party/skia 9803b8f1d197..2a0967383087 (16 commits) (flutter/engine#7285)

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Top left and top right for big FABs, and top left for mini FABs.

Also, some code cleanup.