* remove Source.behavior, fix bug in depfile invalidation

* more cleanup of assets

* Add skip

* address comments

* Update build_system.dart

Added tests for the new Android heading semantic flag to android_semantics_testing.

* Adding handling of TextInputClient.onConnectionClosed messages handling to Framework

* Adding more test cases for closing connection to editable_text_test

* fixing analyze error.

* Fixing analyze error in the test file

* Fixing comments on the new method

* Adding more closing connection examples.

* Indentation change

* Remove auto-add white space

* Changing the oncloseconnection behaviour to stop editing. Updating the tests

* Addressing PR comments. Added explicit log for method channnels to the tests. Added comments to the interfaces.

* add more documentation

* Wire enableFeedback parameter through MaterialButton, RawMaterialButton, and IconButton.
Co-Authored-By: Shi-Hao Hong <shihaohong@google.com>

This reverts commit 99cd4403.

This is being done to match the Material spec. It will likely break many visual diff tests.

git@github.com:flutter/engine.git/compare/44c9fab7b4d8...8ea19b1c76f6

git log 44c9fab7b4d8..8ea19b1c76f6 --no-merges --oneline
2019-10-31 skia-flutter-autoroll@skia.org Roll src/third_party/skia 549325c87e9d..809ec77893be (1 commits) (flutter/engine#13458)
2019-10-31 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from p7XYM... to JngMB... (flutter/engine#13456)
2019-10-31 iska.kaushik@gmail.com [fuchsia] [packaging] Prettify parent folder name (flutter/engine#13463)
2019-10-31 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/linux-amd64 from nhX22... to 866GG... (flutter/engine#13450)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

This adds accessors for WidgetsBinding.instance.focusManager and WidgetsBinding.instance.focusManager.primaryFocus so that they can be more easily found in IDEs and accessed.

This adds a top level getter for WidgetsBinding.instance.focusManager.primaryFocus called primaryFocus, and a static accessor FocusManager.instance that returns WidgetsBinding.instance.focusManager.

git@github.com:flutter/engine.git/compare/73541c97b8b6...44c9fab7b4d8

git log 73541c97b8b6..44c9fab7b4d8 --no-merges --oneline
2019-10-31 bkonyi@google.com Roll src/third_party/dart d50c158d42..bbe2ac28c9 (19 commits)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/7c80d62e89f6...73541c97b8b6

git log 7c80d62e89f6..73541c97b8b6 --no-merges --oneline
2019-10-31 iska.kaushik@gmail.com [recipe] Upload sky_engine to CIPD (flutter/engine#13464)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

git@github.com:flutter/engine.git/compare/4b76fadbf438...7c80d62e89f6

git log 4b76fadbf438..7c80d62e89f6 --no-merges --oneline
2019-10-31 iska.kaushik@gmail.com CIPD needs the directory to be relative (flutter/engine#13461)
2019-10-31 1541038+josh-ksr@users.noreply.github.com Force orientation change when current orientation not allowed on iOS (flutter/engine#13170)
2019-10-31 jason-simmons@users.noreply.github.com Duplicate the directory fd in fml::VisitFiles (flutter/engine#13448)
2019-10-31 amirh@users.noreply.github.com Fix iOS crash when multiple platform views are in the scene (flutter/engine#13449)
2019-10-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 7df14d055703..549325c87e9d (11 commits) (flutter/engine#13447)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC cbracken@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Makes sure that disabled InkWell/InkResponse and widgets that use them don't allow themselves to be focused.

ListTile, PopupMenu, and Stepper were not setting canRequestFocus properly on the InkWell, and InkWell was allowing focus even if it was disabled (it was basically just relying on the containing widget to set canRequestFocus properly). Now InkWell must both be enabled (have an onTap or similar) and have canRequestFocus set to true.