Camera2: notify the gallery that camera storage path was changed

need to notify the gallery that user changed the camera storage path
Thanks to Scott Warner for the Gallery part

as well this patche adresses 2 smaller issues

Change-Id: I04b087586254b24dc9b3ec7b50f2d313cc4efbaf

Conflicts:
	src/com/android/camera/CameraActivity.java
	src/com/android/camera/PhotoModule.java
	src/com/android/camera/Storage.java
	src/com/android/camera/VideoModule.java