[automerger skipped] Merge "Ensure isTopBucket() gets set when there is just one notification" into qt-dev
am: 68f3bb1305 -s ours
am skip reason: change_id I615b2f7fddca30dae67dbaab0e5d54a824a4c441 with SHA1 2d35980e72 is in history

Change-Id: I37cdb13b72ac7c4da5df1db6ee07209ed20353db