Merge "PiP: Take inset into consideration when calculating stash offset." into sc-dev am: 7fc1313d am: 5b28cdf3 am: 6374c94f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14345460

Change-Id: I45fd6581087a1ede9c02c45b3858649c2d36e0df