Launcher: Properly mute the voice recognition beep

This patch fixes the stream that remained muted even when the
launcher was paused

Change-Id: I72af6bc4da6be216e2727e69c14c5efb23b38294
Hotseat: Allow customization of the app drawer button icon

Change-Id: Ic0904cafdd80c57851df9193eee6569cd4a2ae17
Hotseat: Add a check to make sure we're granted storage permission

Change-Id: Ib230256edf62cdfbc63bd33a6d24e45da1464d29
Use a persistent Uri for app drawer button image, remove system permission

Change-Id: Ief3007dd0e8f7992b0c685df3c55c566fdeb14f8
Merge remote-tracking branch 'omni/android-4.4' into darkkat-4.4.3