Merge "Removed unwanted shadow in restart and letterbox education dialogs"...

Merge "Removed unwanted shadow in restart and letterbox education dialogs" into tm-qpr-dev am: e20f8164 am: a1e7c32e am: 89c1efe4 am: bb657a6e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21408602



Change-Id: I5dcaa4e998689ff74a4a5c8ee56c43b9535a8d1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>