Merge "Place mirrored layers offscreen instead of at root." into sc-dev am: 707e8136 am: 4cef044c am: 81208796

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15340011

Change-Id: I3226a44459a192cf6a5beb47e4448a4e0731edd9