Don't notify updates while initializing AnimatorSet am: c720d0af30

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22182983

Change-Id: Iae4c142dceaa3460ec7c501002585a0c8ce37ac8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>