Call pause() and resume() on child animators. am: fd41f0f6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22183002



Change-Id: Idb3526a63d50c3a13712ff38f9fd7f10738845f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>