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

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



Change-Id: I03666f0b216f0ddc6c2ade920236901e0ada1073
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>