Merge remote-tracking branch \'aosp/upstream\' into master am: 3d5a0af8 am: 0d0249c4 am: 8b06abde am: e8bb635b * commit 'e8bb635b': Support ExtendProperties that can append or prepend Change-Id: Ib1347f94e4c3a19821f98b22971a15a4097eb14c