Add external storage capability

Change-Id: I600d82528de2ef8192967d3802cdab3012840c30

Conflicts:

	res/values/strings.xml
	res/xml/video_preferences.xml
	src/com/android/camera/CameraSettings.java
	src/com/android/camera/PhotoModule.java
	src/com/android/camera/VideoController.java
	src/com/android/camera/VideoModule.java
Fix Camera screen nail for external

Change-Id: I1a375c84734ca4a26f1ef204636a04aa7373f7bd

Conflicts:

	src/com/android/camera/PhotoModule.java
Fix External storage detection

Change-Id: I0ef995bb664d5f3f782216eb78f19e988ce056d6
Fix Camcorder screen nail for external

Change-Id: I05872a860ae5cfcb2baf480c2f866bd3df977086
Rename string for external sdcard for clarity
Signed-off-by: Luis Cruz <ljc2491@gmail.com>

Change-Id: I7845f7cafea46a500b604b7c694abefee60f9ae1