Merge "Execute app transition if starting window is drawn" into sc-dev am:...

Merge "Execute app transition if starting window is drawn" into sc-dev am: e8db0791 am: 8438fdc0 am: 098f4309

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14934413

Change-Id: I1c83d2cc9044d5b9f6bf285cc3e5d763b1d17ae0