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

Merge "Let default transition handler animate customized animation" into udc-dev am: bfd84899 am: 75d53169

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



Change-Id: Ibf5981e3976108a2906b86513876cff6920f99aa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>