Launcher: Properly mute the voice recognition beep

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

Change-Id: I72af6bc4da6be216e2727e69c14c5efb23b38294
Merge pull request #1 from omnirom/android-4.4

Launcher: Properly mute the voice recognition beep
Merge pull request #2 from SpeedGroup/android-4.4

upgrade branch