minor update to flutter daemon

Let RenderObjectWidgets use inherited properties

Update RichText dartdoc

[ios] improve test device naming

The new name format is "DEVICE_TYPE_NAME (Flutter)". For example:

iPhone 6 (Flutter)
iPhone 6s Plus (Flutter)

The names are taken from `xcrun simctl list --json devicetypes`.

Fixes #2682

The old text was misleading because it was written when RichText was an
implementation detail of Text.

Fixes #2624

This prepares us for depending on the LTR/RTL inherited property in
RenderObjectWidgets.

[driver] API for getting performance traces

Example that builds a Flutter Android app using Gradle

Updated AppBar.copyWith parameter names

More flutter analyze regexp cleanup

Add @override to starter template

Runs clean on the repo.  Moving ahead, we can manage exceptions via `.analysis_options` or specific source-level ignores.

Add @override annotations to flutter framework

Improve error handling for ChildView outside MojoShell

Stop using a prebuilt APK

add more type annotations

Instead, require an AndroidManifest.xml and always build an APK.

Fixes #2517

Update .analysis_options to link to blocking bugs

Now we should some placeholder error text in-band in checked mode.

Fixes #2611

[rename fixit] TwoLevelSublist left->leading, center->title

Also, some minor cleanup in activity.dart, though much more is
needed (see https://github.com/flutter/flutter/issues/2668).

Remove some more 'dynamic's

Added AppBarBehavior.under, etc

Even more types

change the description of the drive command

misc tool ui changes