Merge "Apply transaction when starting back nav" into tm-dev am: 9e9a9d36...

Merge "Apply transaction when starting back nav" into tm-dev am: 9e9a9d36 am: 3f171257 am: e9000745

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17570481



Change-Id: Iaf28873e4c6a955773842a56f73f016dc113a3ba
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>