This reverts commit 3597bae6.

So we can test SkSL precompile using the command line tools.
See https://github.com/flutter/engine/pull/12412.

...because otherwise, processes that think they're manipulating your
filesystem will be doing crazy things the test is ignoring, leading to
(at best) failures and (at worst) flakes or disk corruption.

Move tools tests into a general.shard directory in preparation to changing how we shard tools tests (#36108)

An upcoming change in the Dart SDK changes `Socket` from
implementing `Stream<List<int>>` to implementing `Stream<Uint8List>`.
This forwards-compatible change in flutter_tools prepares for that
Dart SDK change.

https://github.com/dart-lang/sdk/issues/36900

* Add emulatorId to Android and iOS emulator devices

* Update docs

* Review tweaks

* Add tests for AndroidConsole for getting avd names

* Remove unused import

* Remove duplicated header

* Fix imports

* Whitelist adb.exe heap corruption exit code.

In android platform tools 29.0.0 adb.exe shell seems to be exiting with heap corruption exit code, otherwise producing results as expected. This PR whitelists this exit code on Windows.

Fixes https://github.com/flutter/flutter/issues/33938.

* Fix condition

* Fix 'shell am start' command

* Fix stop command

* Refactor into runAdbMostlyChecked(Sync/Async)

* runAdbMostlyChecked -> runAdbChecked

* Allow adb stdout to contain the port number without failing

* Add tests that port forwarder correctly responds to known ADB output

* Allow for gradle downloading missing SDK assets if SDK licenses are present.

*  Improvements for windows testing

This reverts commit 6f5e88a5.

* Allow for gradle downloading missing SDK assets if SDK licenses are present.

* Fix license path for missing sdkmanager

* Cirrus re-run...

* Fix condition check

* rename props, add docs, rename method

* fix tests after param changes

* Fix weird path for flutter run and add tests

* remove print, fix tests

Apparently, this accounts for 13% of our crashes in Beta.

* enable lint unnecessary_new

* fix tests

* fix tests

* fix tests

* Upgrade everything except matcher.
* Roll matcher (and test)
* Adjust tests that depend on flutter:test directly to depend on a shim
* Require use of package:test shim and remove other references to package:test

* Bump mockito to 3.0.0-beta

* Few fixes

* fix test

* Bump image

* Fix

* New packages update

* With matcher pinned

* No more typed

* fix spacing issue and add test for supportsHardwareRendering

* remove extra async tag

* move spacing to prev line

* route device issue diagnostics to flutter doctor

* review comments

* review comments

Our emulator detection was based on a simple heuristic that was
failing for the Samsung Galaxy S8. Any heuristic is flawed since
Android devices can report whatever they want to adb, but this
change attempts to tighten the detection by listing known models
(by their ro.hardware property). Again, these values could be
spoofed by emulator system images, but it's less likely to be
an issue than with our previous (and fall-back) heuristic.

Fixes #10203
Related: #10248

* fix an encoding issue with calling adb shell getprop

* move code in catch block

* add a test

* switch to LATIN1 encoding

@Hixie: as per our conversation, a little more concise.

* better parsing of adb devices output

* re-order lines

And fix a zillion omissions this uncovered.