Merge "[3/n] Improve LetterboxConfiguration readability" into udc-qpr-dev am:...

Merge "[3/n] Improve LetterboxConfiguration readability" into udc-qpr-dev am: 671bd95e am: 497a4510

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23692484



Change-Id: If1aa9ec6ae55e4bafe20da2ab2b2fa925d2cfc4c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>