Compatibilize app close tests with ARM CF

Also ensure AssumptionViolationExceptions won't affect cujCompleted test

Fixes: 262248398
Fixes: 262247214
Bug: 262390300
Test: atest FlickerTest:com.android.server.wm.flicker.close
Change-Id: I06a63a1aff68350496175112a8a9b21fd5a25418
13 files changed