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: 21b3e879 am: 73280258 am: 60469a62

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



Change-Id: If5868ed8edb3979c855d6681042183d2c9171ce9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>