Merge "Reset letterboxVerticalPositionMultiplier with adb" into udc-qpr-dev am: f0596b828d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24788947

Change-Id: Icca2b9487764e3673864d6d7e87cdfae28766077
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>