Merge "Make letterbox education dialog react to dark/light themes" into...

Merge "Make letterbox education dialog react to dark/light themes" into udc-dev am: 89106926 am: c450887b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22930896



Change-Id: I4ab3593b60ef8e549590cc012094d17a940e8e06
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>