CMFM: Notify to media scanner when some file changed

Patchset 2: Remove unnecessary calls to media scan

Change-Id: Ie56ccdd992e2a93c63ab7587135de7cb63bff92e
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Merge "CMFM: Notify to media scanner when some file changed" into cm-10.2