Merging from ub-launcher3-qt-qpr1-dev @ build 5834630

Test: manual, presubmit on the source branch
http://x20/teams/android-sysui/merge/ub-launcher3-qt-qpr1-dev_5834630.html

Change-Id: I42b66c2a98866ee234d1f573c74e84509239e40d