Merge "Temporary decouple snapshot controller from transition." into udc-dev am: 1f0b42df

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22196642



Change-Id: I2672b5c43fc98ee4762cc6b1893a33653b7eb2f9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>