It is not enabled by default in the VM because applications not launched via the tools may try to connect with the debugger. This causes the debugger and the IDE to hang on Mac.

Fixes https://github.com/flutter/flutter/issues/7035

Includes fixes to the VM and analyzer.  Hopefully final RC.

* Use touch to avoid race condition in file modification test

* Remove unused import

* Add --record-to option to flutter tools

This option will cause flutter tools to record all process
invocations that occur and serialize their stdout and stderr
to files that get added to a "recording" ZIP file. This is
part of an effort to be able to test flutter tools in a hermetic
environment.

As a side-benefit, this recording should prove an excellent
attachment to any bug report.

* reapply handle new Observatory URL changes
Fixes https://github.com/flutter/flutter/issues/6843

* allow non numeric IPv4 addresses
Fixes https://github.com/flutter/flutter/issues/7051

We don't need these anymore.

Last full push to dev before `1.21` stable.

Fixes #6915

Changed DefaultTextStyle to consider the TextTheme defined in the context for Bottom Nav Bar (#7042)

* Changed DefaultTextStyle to consider the TextTheme defined in the context

* added regression test for bottom nav bar text themes

* added second regression test for fixed navbar

Fixes https://github.com/flutter/flutter/issues/6947

With this change, they're run via instance methods on an object
obtained through the context. This will allow us to substitute
that object in tests with replay/record versions to allow us to
mock out the os-layer in tests.

* Skip failing input tests

* Only skip on Mac OS

Started failing at 0b737ac5.

https://github.com/flutter/flutter/commit/737a55ef3e47036220e72f3b3e17353d461b5fab