Tweak the primary flutter build rule so that fuchsia is more similar to
other platforms in how tests and the shell are built.
Only embedder_unittests and GLFW tests are disabled on Fuchsia now.
TEST: Ran unittests on host/fuchsia; workstation on fuchsia
BUG: fxb/53847, fxb/54056
No change in behavior expected. We have 2 frames in flight as before. By switching to Present2 and specifying a kMaxFramesInFlight however, we allow us greater flexibility to change how Flutter schedules its frames.
This change also adds tests for SessionConnection and VsyncRecorder.
- Copies fuchsia_test.sh into the testing/fuchsia directory
- Fixes a small issue with fuchsia_archive to ensure the cmx file is correctly named according to the target
- Add a list of fuchsia unittest fars to run on CI
- Add a GN build target to build all currently-enabled unittests for Fuchsia
