Merge "Let default transition handler animate customized animation" into...

Merge "Let default transition handler animate customized animation" into udc-dev am: bfd84899 am: eee875a9 am: a86313f3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23563396



Change-Id: Idc7dd7520d95de2e37508467f67766e8f2f26627
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>