Merge "Only need to dismiss stage if one of the task is closed." into udc-dev am: 54d018e1de

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22779458

Change-Id: I793feed9d30b2ae7ccb46470399261c1d12ea0fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>