[automerger skipped] AudioFlinger: put effect desc lookup under mutex for createEffect am: a41770b682 am: ef52b30f9c am: b6a54df739 am: a504d888d4
am: 792b528b81 -s ours
am skip reason: change_id I9d339a7d6d81161065e1adaf427dd2d3430436c2 with SHA1 2046ec756e is in history

Change-Id: Ia8a82cf012b60c73cf0a43ea78171e585fa837e7