CMFM: Double click to open associated intent

When an item is selected, then open the item if the user tap again over the item

Change-Id: Ifd34d39b9b1393dc3bb8d83f1fc25efc8a34683b
JIRA: https://jira.cyanogenmod.org/browse/CYAN-770
Bugfix: CYAN-770
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>