Merge "Make sure empty TaskFragment notify organizer" into tm-dev am:...

Merge "Make sure empty TaskFragment notify organizer" into tm-dev am: 597b031c am: 81eca7ea am: edef55d6 am: b2f4590b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18085612



Change-Id: Ic7c74b9f8786a2a0e53a529f2142b8e65470f507
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>