Merge "Fix overdraw lint warnings in letterbox dialog" into tm-qpr-dev am: c7355639 am: 98cc6ca0 am: 1797edb8 am: e9114c09

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21612779



Change-Id: Idad9b8a107a30749dcfcd7de5526b3bf5f6fd37f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>