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

Note that that tests are disabled for PIP2 since we haven't supported
it.

Bug: 356277166
Bug: 380397174
Change-Id: I340b96c5c62a4bc2d5c7c2f71b2507ed61aded3f
Test: atest BottomHalfExitPipToAppViaIntentTest BottomHalfExitPipToAppViaExpandButtonTest
Flag: com.android.window.flags.better_support_non_match_parent_activity