Merge "Apply rounded corners to startWindow" into tm-qpr-dev am: 6db1ce2740

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20222491

Change-Id: I3ad8e6719a64c63ac911f66debf50bdf91ae045c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>