* allow per-command analytics suppression

* rev the usage package dep

* send debug events for flutter lifecycle events

* remove the route event

* Added performance instrumentation for compositing addToScene() calls.

* Switched to non-callback versions of the Timeline API.

* Fixed Dart formatting nit.

* handle an exit code from android n

* review comments

Re-enable `one_member_abstracts` lint (#3608).

* updates from the flutter gallery rename

* rename ids to io.flutter.gallery

* add a webmaster tools verification file

* also put the verification file at the root of our bucket

* add comment for when we can simplify this script

- Handles appear with tap or long press.
- Toolbar appears with long press on text, or tap on handle.
- Correct toolbar items shown depending on context.

* shrink analytics message to < 80 chars

* catch line ending

* rename service_protocol.dart to protocol_discovery.dart

* add a wrapper around the obs. protocol

* use json-rpc in run

* consolidate obs. code; implement flutter run --benchmark

* review comments

Fix Flutter Gallery to use title case

@HansMuller

Turn on `avoid_return_types_on_setters` and cleanup annotated setters.

Artifacts from local engine builds will be found based on the --local-engine flag

It's safe to remove the unneeded `void`s from setters since the blocking issues in the
`always_declare_return_types` lint have been fixed (https://github.com/dart-lang/linter/).  We can also safely flip the bit on  `avoid_return_types_on_setters`.

The context and child arguments are required.  We should assert that
they're non-null.

Fixes #3843

Host tools can be found in the artifact cache directory for the host platform.
If a developer wants to use a local engine build instead, then provide an
--engine-build flag that selects the specific engine build variant.

* be more lenient when looking for matching android sdk components

* use a null aware operator

Bump Dart SDK to 1.17.0-dev.3.0.

Keeping up with the Joneses!

Fix crash installing onto certain Android devices