cmfm: create new activity stack when opening a new external intent

This change creates a new stack for the activity opened, so CMFM will not
be linked to the new activity

Change-Id: Ibbdc48d706698b296e27f49272e811d47d54a905
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Automatic translation import

Change-Id: Ie315fbb26d0d8d4fb2e2c6e17838a5f3552b5916
Merge remote-tracking branch 'cm/cm-11.0' into kk4.4