Merge "Let TaskSnapshotWindow compute its window frame" into tm-dev am: da5263eb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17525803



Change-Id: I89bb1f2f30d2a1f3026d28a87b092812f9f49d0b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>