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

Merge "Only need to dismiss stage if one of the task is closed." into udc-dev am: 54d018e1 am: 43084e1b

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



Change-Id: I7cdb1e3ca41c835655af7999830b8b8155f82515
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>