Fix PiP Shell Transitions
PiP Shell Transitions needs to be more robust to pass CTS tests
reliably.
Some changes:
1. DELIVERED_TO_TOP intents don't create a transition since there is
no change to the WM hierarchy. This way the app-launch transition
won't conflict with activityRestartAttempt.
2. If PiP started an expand transition while an enter transition is
ongoing, cancel the enter transition.
a. Additionally, because PiP doesn't resize task until the enter
transition finishes, the expand transition will actually be
a no-op. If we see this pattern, also cancel the enter
transition.
3. When taskVanished, make sure to call any pending finishCallback
because it doesn't allow the running animator to properly finish.
Transition systems require the finish callback to function
properly.
4. Minimize the uses of finishTransition with a sync callback. We
probably need to phase this out because it can conflict with
subsequent startTransition calls (because only 1 sync is supported
at a time).
Bug: 183993924
Test: atest PinnedStackTests
Change-Id: Ieb573032839a2f31b0bb371410484fc93a1714fa
6 files changed