tree 46321410b5a72c15bf7825e9b557795d02ec3123
parent 8d19146b7b90664e1290d1c186c93e6d17fa94e8
author Tony Wickham <twickham@google.com> 1559779419 -0700
committer Tony Wickham <twickham@google.com> 1559780360 -0700

Fix flicker to OVERVIEW state during quick switch

Here's what was happening:
- When animating to a new task, the launcher controller ends first (when
  quick switching it likely ends immediately since we're already scaled up).
- Then we get onApplyWindowInsets(), which re-builds the launcher controller.
- Finally, the window animation ends, invalidating the handler and ending
  the new controller, which sets the state to OVERVIEW.

To fix this, never create a new controller if it has ever been started.

Bug: 133508173
Change-Id: Ibd0e18e488353df73159ffbdd9a3b335bed57d98