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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia73f6c7a664a29a3263063f5ee848274d9397c07