Merge "Check ProjectBackwards property for childrens after children's syncProperties()." am: b22ef02f1f am: 56f018b1e4 am: f1ec514926

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1550595

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Icca967b1c9d5738be115e9db44ce55be58f3fd15