Prevent lock/unlock sound during music playback

Lock/unlock sound mixes in with music and causes
lag and distortion.

Change-Id: I9d3582c6bf28aa62a5a6712bc9e89eb2f73e0288
ExternalStorageProvider: Add support for root and external storage

Google decided to only show the emulated (fuse) internal storage in
ExternalStorageProvider. This provider is used to display storages
in DocumentsUI, the Kitkat file picker, that can be used by apps.

It would be a shame if you can't pick the pictures that are on your
external SDcard :)

Change-Id: I96a8d75ccc911f6f0e7f091c20aaefd510dc3327
base: fix external sdcard mountpoint

It needs to add that line on init.xxxx.rc on rootdir folders.

"chown root root /mnt/media_rw"

Needed for devices that has some troubles mounting storages.

Credits: http://forum.xda-developers.com/showthread.php?t=2537793

Change-Id: I0c9e2ae5439c8d8a762904e2760eb6590ce77a62

Conflicts:
	data/etc/platform.xml
framework-res: Remove gingerbread scrolls