Flutter plugin for Android Studio v71.1

[Steve Messick]

After upgrading IntelliJ to version 2022.3 many people started seeing an error when they launched IntelliJ: Non-cancellable section in FAST_TRACK. After investigating, we discovered the Flutter plugin was doing a lot of work in the foreground that should have been done in a background thread. This point release fixes that problem. Note: this did not affect Android Studio.

A few other issues are resolved:

o Restore device selector when using the new UI

o Support new project types in the new project wizard: empty and plugin_ffi

o Change Container to Placeholder in live templates

o Fix test coverage for monorepo projects