Merge "Group broadcasts occurred within a certain duration into sessions." into tm-dev am: 0a790c64 am: d2cdcde5 am: 73d58acd

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18360308



Change-Id: I637bbd6e0be4d77060879759114bf8969601c52f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>