Add a sound-playing method to Camera API.

To allow applications with non-standard Camera use cases to use the
platform sound files and routing, add a method to play any of the
standard Camera sounds (shutter, autofocus, record start/stop) using a
background thread.

Bug: 5447107
Change-Id: I2524853a626e3ce334a7aad2f7de061d5c04abd0
diff --git a/data/sounds/AudioPackage7.mk b/data/sounds/AudioPackage7.mk
index 93e0fa0..6ae624e 100755
--- a/data/sounds/AudioPackage7.mk
+++ b/data/sounds/AudioPackage7.mk
@@ -21,6 +21,7 @@
 	$(LOCAL_PATH)/effects/ogg/KeypressReturn_120.ogg:system/media/audio/ui/KeypressReturn.ogg \
 	$(LOCAL_PATH)/effects/ogg/VideoRecord.ogg:system/media/audio/ui/VideoRecord.ogg \
 	$(LOCAL_PATH)/effects/ogg/camera_click.ogg:system/media/audio/ui/camera_click.ogg \
+	$(LOCAL_PATH)/effects/ogg/camera_focus.ogg:system/media/audio/ui/camera_focus.ogg \
 	$(LOCAL_PATH)/effects/ogg/LowBattery.ogg:system/media/audio/ui/LowBattery.ogg \
 	$(LOCAL_PATH)/effects/ogg/Dock.ogg:system/media/audio/ui/Dock.ogg \
 	$(LOCAL_PATH)/effects/ogg/Undock.ogg:system/media/audio/ui/Undock.ogg \