Make "SD Card removed" notification dismissible if the removed SD Card is not the primary storage

The Galaxy S uses the "external SD Card" as the extended storage
and it the notification should be dismissible as it's okay not
to have it.

Additionally, this patch also not hide the USB storage mount dialog
if the removed storage is not the primary storage

Adapted for CM 11

Change-Id: Ic752a3da917e0d7736a619fb68f07905106987fb
Keyguard: smooth background change.

Change-Id: Ia0e4d0000db72b5cdb6fede03791805e34fa311d
Active display [squashed] (1/2)

Change-Id: I709196b232609a1dab8e9d7fdd0a6a655d487d93
Merge branch 'cr-4.4' of https://github.com/cristianomatos/android_frameworks_base into cm-11.0