Revert "Add flicker tests to verify non-match parent on exit PIP"

Revert submission 30467296-bottom_half_exit_pip_flicker_tests

Reason for revert: Droidmonitor created revert due to b/380397174. Will be verifying through ABTD before submission.

Reverted changes: /q/submissionid:30467296-bottom_half_exit_pip_flicker_tests

Change-Id: I1a3ec44fe700285d6a613451fbdaba72c7738bbb
12 files changed