9920 Fix caching of Locale.toString (cla: yes)

9922 Split out lifecycle protocol (cla: yes)

9923 Fix failure of the onReportTimings window hook test (cla: yes)

9924 Don’t try to use unset assets_dir setting (cla: yes)

9925 Fix the geometry test to reflect that OffsetBase comparison operators are a partial ordering (cla: yes)

9927 Update Buildroot Version (cla: yes)

9929 Update the exception thrown for invalid data in the codec test (cla: yes)

9931 Fix reentrancy handling in SingleFrameCodec (cla: yes)

9932 Exit flutter_tester with an error code on an unhandled exception (cla: yes)

9933 Build fuchsia artifacts from the engine (cla: yes)