Merge "Add gravity center to layout params" into sc-dev am: 98a4967908 am: f1d31a1974

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15411507

Change-Id: Ib8b3dbbcf46fa3a1fdd6f996decbfc2ad1d2b694