Merge "Adjust smallestScreenWidthDp for letterbox" into tm-qpr-dev am: ac2768ae43

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19416406

Change-Id: I6712a5164c94cd16a437b785fee16309d9b2915b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>