Nobody knew what a Block was.

Now the scale gesture will accept if its focal point moves more than the pan
slop. This change lets it compete with a drag gesture (e.g., a containing scrol
view) in the same way that the pan gesture does.

Fixes #8735

Gradle APK builds include engine binaries for all applicable architectures

Fixes https://github.com/flutter/flutter/issues/6849

Aggressively apply the const lint.

enterText() now includes a call to idle().

Fixes a bug where tapping in the text under edit moved the cursor but
did not push the updated selection to the engine.

Adds a test for caret position updates.

Pulls in latest 1.23. cherry picks, including @abarth’s fix to restrict `@immutable` checks to instance fields.

Fixes https://github.com/flutter/flutter/issues/9259

Fixes #9246

Support for placing an AOT dylib in the flx.  Part of Fuchsia AOT support.

* Allowing overrides to the activeOpacity of the button

* adding tests

* fix

* fixing animation

* fixes

* moar fixes

Still many more to go.

Fixes #7519

Fixes https://github.com/flutter/flutter/pull/8643

Fixes https://github.com/flutter/flutter/issues/8804 by adding a test
to verify that Material elevation changes animate.

Also tweak some dartdocs, add some trailing commas, improve some
toString output, make the inkwell test agnostic to the PhysicalModel
logic, and move the material buttons test to the material test
directory.

The Wrap widget is a layout that places children in a run in order along its
main axis until it runs out of space. At that point, starts placing children in
a new run that is adjacent in the cross axis.

Fixes #8831

Also adds a test to make sure we don't break it again.

This yak shave went as follows:

Fix https://github.com/flutter/flutter/issues/8795 by adding stocks to
the examples README.

Notice the layers entry in that README isn't quite right either.
Update that.

Check the layers/README file is worth pointing at.

Update the layers/README.

Let's run some of the layer tests to see if they still work.

Oops, need to update them to gradle.

Ok let's try running them again.

Oops, sector is broken.

Add a test for sector.

Fix sector. Find you need to add an assert to a const constructor.

Notice we need to turn const asserts on for the analyzer.

Notice the analysis_options files are out of sync with each other and
with the full list of lints.

Turn on the lints that should be on.

Fix the bugs that finds.

* Roll Dart to 1.23.0-dev.11.3.

This is expected to fix the Windows crashes reported in https://github.com/flutter/flutter/issues/8912.

* fix tests

* Roll to 1.23.0-dev.11.5

* Fix tests

Mostly related to semantics and scrolling.

Add some commentary around DefaultTabController.initialIndex.
Fix typo (nuull) in TabBar.
Make some asserts more detailed.