Merge "Add Predictive Back animation to all SysUI dialogs" into tm-qpr-dev am: f58340245e am: e17675d2db

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21096327

Change-Id: I8d10439e5fcbfe6f36d3b4d8f2283db0c9b938b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>