Revert "Merge "Mark AppStateTrackerTest#testAllListeners as Flaky." am: 2a5005ac am: e112ed78"
This reverts commit e3083a76.
Reason for revert: This test is ~10% flaky everywhere but git_master,
so it's OK to continue running it on git_master.
Change-Id: I8b634c54d81dd025fd1b57d91479dcd996f3f30a