This reverts commit 19c08e89.

The attempted revert doesn't fix the problem, so we'll reland.

This reverts c9d920f3 so that we can attempt to fix the build. The build dashboard clearly shows that things started failing at this change, although it's not totally clear that it is the cause: tests succeed locally.

If it doesn't fix things we can re-land this.

This test is flaky if CPU/GPU measurement is enabled due to
https://github.com/flutter/flutter/issues/41577

TBR: @goderbauer

This reverts commit baea9bf7.

Additionally,   we let the test run on mac8 with iphonexs because the test won't run on Xcode 10.1 (mac3-7). Hence we force it to run on mac8 which currently has Xcode 10.2.

This reverts commit 67b5bdf9.

Reason: it broke device lab.

TBR: @goderbauer 

This reverts commit f1e7fe81.

This fix is in https://github.com/flutter/packages/pull/39

This reverts commit 652be88e.

This fix is in https://github.com/flutter/packages/pull/37

This reverts commit 43932aa2.

This reverts commit 96482eeb.

Before this change, having an Android app depend on a plugin that has no android implementation resulted in a Gradle build failure.

This scenario is likely to become more common if we're enabling federated plugins, as the package implementing just the desktop implementation of a plugin won't have an Android implementation.

This changes the Gradle plugin to not try to build any plugins that doesn't have an android/build.gradle file.

This reverts commit af9f424d.

Reverts flutter/flutter#39439

Reason: this passed the local device lab test on my Macbook but it failed in the actual device lab. Will investigate, fix, and reland.

TBR: @dnfield @goderbauer @tvolkert @Hixie 

For https://github.com/flutter/flutter/issues/33899

Test added:
- simple_animation_perf_ios

Test modified:
- backdrop_filter_perf_ios__timeline_summary

We'll add the CPU/GPU measurement to more iOS tests
once it's proven to be non-flaky.

It's still hitting global devicelab timeout

It was hitting the global devicelab 15 minute timeout.

This reverts commit b38302b0.