Merge "Revert "Adjust smallestScreenWidthDp for letterbox"" into tm-qpr-dev am: 928a1ea2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19350544



Change-Id: Ib60db959f84c1ef21024d408cc57f2974811b5b5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>