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

Bug: 356277166
Test: atest BottomHalfExitPipToAppViaIntentTest BottomHalfExitPipToAppViaExpandButtonTest
Flag: com.android.window.flags.better_support_non_match_parent_activity

Change-Id: I985446276dcde360562550b06f736926e2597c68
12 files changed