Merge "[automerger skipped] Merge "Add carrier config for conference participants data support" into qt-dev am: 23b6339ebd -s ours am: 5cb9683fd7 -s ours am skip reason: change_id I88edd5a590f46b961c986ef0bf24585b3c2cf4a1 with SHA1 37ca693d78 is in history" into qt-r1-dev-plus-aosp