* implicit-casts:false in flutter/lib/src/material

* address review comments

* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs

No code changes, just comments: I spell-checked all the comments in the repo.

* make BuildContext.{ancestorStateOfType,ancestorRenderObjectOfType,rootAncestorStateOfType} generic

* make BuildContext.inheritFromWidgetOfExactType generic

* make BuildContext.ancestorInheritedElementForWidgetOfExactType generic

* make BuildContext.ancestorWidgetOfExactType generic

* fix snippet

* bump scoped_model on temp version

* update names

* Revert "bump scoped_model on temp version"

This reverts commit d1fcbba028cdb07f44738d1652391692d1ea5ec0.

* address review comments

* fix ci

* address review comments

* repeat the deprecation notice

* fix uppercase

* use of recommanded deprecation syntax

* address review comment

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.

* use null aware operators

* rollback changes about null-aware operator

* disable lint prefer_is_not_empty

Also includes counter-examples for list items that differ from ListTile.

* add trailing commas on list/map/parameters

* add trailing commas on Invocation with nb of arg>1

* add commas for widget containing widgets

* add trailing commas if instantiation contains trailing comma

* revert bad change

This converts existing ## Sample code samples to {@tool sample}...{@end-tool} form.

Also:
1. Fixed a minor bug in analyze-sample-code.dart
2. Made the snippet tool only insert descriptions if the description is non-empty.
3. Moved the Card diagram to before the code sample.

* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests

* lint unnecessary_new on samples

* fix tests

It was causing problems rolling Flutter into Fuchsia

* re-enable lint unnecessary_const

* remove trailling whitespaces

* remove unnecessary const (after merge)

This reverts commit cc1cf13e.

It should be calling `tile.getDistanceToActualBaseline()` rather than
`tile.getDistanceToBaseline()`.  This is causing us to hit assertions
`getDistanceToBaseline()`

restored https://github.com/flutter/flutter/pull/17496
restored https://github.com/flutter/flutter/pull/17580

This reverts commit ee019c0b.

Take into account the subtitle height when adjusting the height of the widget. Added a test.

This allows other code to get the same style without having to know exactly it is computed.

Fixes https://github.com/flutter/flutter/issues/11993