am fd9b8fb4: am 99fb5046: am fc12b5be: am b5fa4dff: Merge "Fix bug 2594126 Do...

am fd9b8fb4: am 99fb5046: am fc12b5be: am b5fa4dff: Merge "Fix bug 2594126 Do not crash when ViewRoot is trying to play a UI sound. This CL doesn\'t fix why mView can be null in the first place, but prevents a crash when mView is null and a UI sound is to be played."