Consolidate snapshotGone into waitForFullScreenApp

Remove starting window is an internal animation, and can happen when
opening an activity, add the wait condition to preventing the transition
finish too early.

Bug: 226684870
Test: atest FlickerTests:SwitchImeWindowsFromGestureNavTest
atest FlickerTests:QuickSwitchBetweenTwoAppsForwardTest
atest FlickerTests:QuickSwitchBetweenTwoAppsBackTest

Change-Id: Iab31d92a83bc65582beb8f88b825fe6c43b7e01e
1 file changed
tree: 916c59a4d1113b8d63597751d8029cb5027c1592
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg