I can't come up with a better name; anything with Simulator or Device in it will be confused with the existing IOSSimulator/Device classes (which represent the running devices).

`flutter emulators nexus` will now return only those that'd match (eg. same things that `flutter emulators --start nexus` would match).

And it's not obvious to the use what the ID is.

Added an exists check to ensure we don't try to run if emulator is missing, but that requires the file extension for Windows.

Windows sets HOMEDRIVE/HOMEPATH.

It's too fast and leaves weird output on the screen

Very basic support for "flutter emulators" which just lists the available Android AVDs.

Relates to:

https://github.com/flutter/flutter/issues/14822
https://github.com/Dart-Code/Dart-Code/issues/490
https://github.com/flutter/flutter/issues/13379

* Allow customization of TextSpan in EditableText

* Addressed PR comments

* Added test with custom-styled EditableText subclass

* More code style fixes

This replaces the --prefer-shared-library flag, which falls back to
regular (non-shared-lib) compile if the NDK is not found, with the
--build-shared-library flag, which exits with an error message if the
NDK is not found.

This simplifies the set of allowed code paths through AOT compile,
resulting in better testability and easier-to-follow logic. It also
results in more predictable behaviour for continuous integration and
other scenarios.

This contains the following commits:

flutter/engine@11d6da3 Restore Skia revision

This contains the following commits:

flutter/engine@2bc3b3e Roll Skia back to d8a189fca3cdfa064de75a280d5af34cc5026bbe
flutter/engine@5d4a38c Roll src/third_party/skia/ d925f2d38..efb84e673 (4 commits)
flutter/engine@61b5028 Read/apply settings that apply process wide before creating any shell components.
flutter/engine@2d60865 Roll src/third_party/skia/ e7df0bb90..d925f2d38 (4 commits)
flutter/engine@8898939 Roll Skia to e7df0bb900ec266021bc6bf4477d533ce1b1f749
flutter/engine@8450a00 Roll Skia back to d8a189fca3cdfa064de75a280d5af34cc5026bbe
flutter/engine@3192223 Roll src/third_party/skia/ 6198f39ad..e7df0bb90 (1 commit)
flutter/engine@5f08fca Roll src/third_party/skia/ cea8e3d13..6198f39ad (1 commit)
flutter/engine@a0be877 Make thread names more descriptive.
flutter/engine@9110e89 Expose View:OfferServiceProvider to UI thread components in a thread safe manner.
flutter/engine@eb5bbda Specify a custom isolate snapshot per AOT shell launch.
flutter/engine@d97b6d8 Allow explicit specification of the isolate snapshot.

We previously blocked iOS AOT builds, but Android debug builds are
always JIT builds.

Updates the message emitted when a kernel compile is skipped in the
build bundle action. Since we now use fingerprinting to enable
performance of script snapshots, AOT snapshots, and kernel compiles,
this helps a bit with debugging.

Also switches to trace level logging.