Gradle plugin support for adding flutter as subproject to another Android app

https://github.com/flutter/engine/compare/69e9eb1cd1ce...08af410d4ab5

git log 69e9eb1cd1ce..08af410d4ab5 --no-merges --oneline
08af410d4 [dart] Roll dart to a50dfd66980ed5c9aef9851fcc57557fb607769c. (flutter/engine#6472)
25b8bbfb2 Roll src/third_party/skia 817c01aecdc4..a41a74ac7994 (1 commits) (flutter/engine#6475)


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This is required in order to support "flutter run --profile"

https://github.com/flutter/engine/compare/bfcdad855729...69e9eb1cd1ce

git log bfcdad855729..69e9eb1cd1ce --no-merges --oneline
69e9eb1cd Roll src/third_party/skia 9b7bfd09106f..817c01aecdc4 (1 commits) (flutter/engine#6474)
c048bec5d Roll Dart to e4840ec239249ddc6b588fabfca57df2307e0634 (flutter/engine#6466)


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https://github.com/flutter/engine/compare/7ecc879ffd9a...bfcdad855729

git log 7ecc879ffd9a..bfcdad855729 --no-merges --oneline
bfcdad855 Roll src/third_party/skia 00de965d0d31..9b7bfd09106f (11 commits) (flutter/engine#6471)


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https://github.com/flutter/engine/compare/88facf405434...7ecc879ffd9a

git log 88facf405434..7ecc879ffd9a --no-merges --oneline
7ecc879ff Fix failing test on Cirrus (flutter/engine#6469)


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https://github.com/flutter/engine/compare/572fa5646af7...88facf405434

git log 572fa5646af7..88facf405434 --no-merges --oneline
88facf405 Roll src/third_party/skia 8ad991da4c04..00de965d0d31 (6 commits) (flutter/engine#6467)
647302a28 Correct issues in visible children determination (flutter/engine#6455)
0052733e5 Roll src/third_party/skia 95320ee01f5b..8ad991da4c04 (1 commits) (flutter/engine#6465)
7decce221 Roll src/third_party/skia 9aa3f9095622..95320ee01f5b (1 commits) (flutter/engine#6463)
2667780b9 Roll src/third_party/skia beb1559bc61f..9aa3f9095622 (1 commits) (flutter/engine#6462)
5d28dce5e Roll src/third_party/skia e9b61ef5aa34..beb1559bc61f (1 commits) (flutter/engine#6460)
54b709d3a Roll src/third_party/skia 71143d6cc039..e9b61ef5aa34 (1 commits) (flutter/engine#6459)
9fc5013eb Roll src/third_party/skia 623d2e4120c2..71143d6cc039 (1 commits) (flutter/engine#6458)
841454c8d Roll src/third_party/skia 29b11d605f25..623d2e4120c2 (1 commits) (flutter/engine#6457)
5331df8e4 Roll src/third_party/skia d037f4d204c2..29b11d605f25 (1 commits) (flutter/engine#6456)
6d4de7fc8 Roll src/third_party/skia 51c89e41c05b..d037f4d204c2 (9 commits) (flutter/engine#6454)
ba9b90766 Add `run_tests.sh` to cirrus (flutter/engine#6441)


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Publish make-host-app-editable command with CLI docs.

* Update uses of ButtonTheme.bar

* updated gallery themes

* Remove unnecessary const

Fixes #22789

* Refactor AnimatedSwitcher

This is mostly just a little bit of cleanup with hopefully no semantic
changes, done to teach me how the code works so that I could fix a bug.

* Add debugging information to AnimatedSwitcher

* Fix AnimatedSwitcher to handle the case of back-to-back changes

Previously, if a child was replaced the very next frame after it was
added, we'd get confused because we tried to reverse the controller,
which causes us to remove the child from the going-away list, before
we had added the child to the list in the first place.

The fix is just to move the reverse to after the add.

We'll roll this back as soon as the Dart analyzer gets upgraded in
Google3.

* [Typo] it it -> if it

Obviously a small change, looks like a little copy-paste accident.

Adds a Fuchsia compatibility function that allows for connecting to a
specific Isolate by name when running Flutter Driver on a Fuchsia
device.  This will check over multiple Dart VM's in an attempt to find
an Isolate by its name.

* Adds comments clarifying the procedure used to render the menu as well as tests verifying various dropdown menu button positioning and initial scroll states.

Fixes a gradle error where it was failing to find a plugin because of an absolute path in the .flutter-plugins file instead of a relative path.

I had originally removed this variable because I thought it was redundant with the projectDir, but apparently I was wrong about that (one resolves to a relative path, and one resolves to an absolute path).

This PR reverts that part of the change and reintroduces the (not really) redundant variable.

A few changes:

* Remove the search tip (it relies on searching for the new keyword which we no longer use)
* Remove mentioning of examples that are either stale or only used for internal purposes (such as test)
* Cross-link to the samples repo

Revert "Turn on line wrapping in usage and status messages, adds ANSI color to doctor and analysis messages. (#22656)" (#22759)

This reverts commit e4386321
because it breaks 160 benchmarks, and several devicelab tests,
due to changing the format of the output.

Turn on line wrapping in usage and status messages, adds ANSI color to doctor and analysis messages. (#22656)

This turns on text wrapping for usage messages and status messages. When on a terminal, wraps to the width of the terminal. When writing to a non-terminal, wrap lines at a default column width (currently defined to be 100 chars). If --no-wrap is specified, then no wrapping occurs. If --wrap-column is specified, wraps to that column (if --wrap is on).

Adds ANSI color to the doctor and analysis output on terminals. This is in this PR with the wrapping, since wrapping needs to know how to count visible characters in the presence of ANSI sequences. (This is just one more step towards re-implementing all of Curses for Flutter. :-)) Will not print ANSI sequences when sent to a non-terminal, or of --no-color is specified.

Fixes ANSI color and bold sequences so that they can be combined (bold, colored text), and a small bug in indentation calculation for wrapping.

Since wrapping is now turned on, also removed many redundant '\n's in the code.

This all happened because I was trying to be a little too helpful...

Part of the job of the "create" command is to recreate missing pieces of existing projects, and now that the default has changed, I wanted to make it so that if someone had created a default flutter create project before, that they could run a default flutter create there again, and not have it trashed by using the new default template (application) over the old one (app).

This meant I had to detect what type of project it was. Unfortunately, in the past we didn't write anything in the .metadata file to identify the type of project, and since the goal was regenerating missing files, I can't count on anything existing, so it's just a heuristic match.

This simplifies the heuristics down to just detecting the difference between "app" and "application" projects, and only detect the other types if they're explicitly listed in the .metadata file (I changed the code in my original PR to add the project type to the .metadata file). People used to have to specify the type for those anyhow, so it shouldn't be a surprise to users.

So, the main difference in the new heuristics from my last attempt is that if you have a directory that has some other stuff it (like maybe a "plugin" project), then we'll recreate (pronounced "mess up") the project using the "application" template, but that was true before (except it would use the "app" template).

Fixes #22726

This reverts commit 3c56e6c7.

It breaks the AOT build.

* first pass

* revert WidgetsBindingObserver

* disable prefer_mixin

* docs and more mixins

* newer engine; binding fixes

* upgrade dependencies

* fix test binding

* remove whitespace

* remove the obsolete `enableSuperMixins: true`

* upgrade dartdoc to 0.22.0

* temporarily use git version of dartdoc

* fix pub global activate syntax

* use dartdoc 0.23.0

https://github.com/flutter/engine/compare/4eaf9ef4271a...572fa5646af7

git log 4eaf9ef4271a..572fa5646af7 --no-merges --oneline
572fa5646 Roll src/third_party/skia 032f2756df64..51c89e41c05b (16 commits) (flutter/engine#6453)


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* updated comment

* [Documentation] Moved lerp macro def to painting/

https://github.com/flutter/engine/compare/90b1023c84c4...4eaf9ef4271a

git log 90b1023c84c4..4eaf9ef4271a --no-merges --oneline
4eaf9ef42 Roll src/third_party/skia a6262495da48..032f2756df64 (2 commits) (flutter/engine#6450)
c5e52dc31 Roll src/third_party/skia 92d10833de63..a6262495da48 (1 commits) (flutter/engine#6449)
efb24f12b Roll src/third_party/skia 4f87e2255b8a..92d10833de63 (2 commits) (flutter/engine#6448)
28e513613 Roll src/third_party/skia d945698c5dfa..4f87e2255b8a (2 commits) (flutter/engine#6446)
a2ea59f2c Roll src/third_party/skia 4302eb9a6e14..d945698c5dfa (4 commits) (flutter/engine#6445)


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* [frdp] Add optional dart isolate filter.

It's now default to filter out non-flutter isolates when searching
across Dart VM's.  This is due to a possible issue wherein an Isolate
for testing might have the same name as the flutter Isolate.

In addition, logging messages have been added in dart_vm.dart for
debugging.

https://github.com/flutter/flutter/issues/22338#issuecomment-425794734 shows almost 1 minute being spent on the `Resolving Dependencies` step alone. Possibly this needs to go higher still, but this should be a good start.

https://github.com/flutter/engine/compare/cf0855e69fa8...90b1023c84c4

git log cf0855e69fa8..90b1023c84c4 --no-merges --oneline
90b1023c8 Remove unused imports and variables (flutter/engine#6437)
1f98aa6df Add the isolate name server to the set of native APIs available on secondary isolates (flutter/engine#6444)


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