fb: support for keyguard widget carusell on tablets

support it as well on tablets and reduce used memory in general
and remove the not needed view instead of just hiding it.

Change-Id: I573bb120c5e3819488fbac6ec12dc9852d4c9be4
fb: notification transparency (1/2)

this add back notification transparency...compared to 4.3
it controlls as well the notification icon backgound transparency
which felt in the past dissplaced. As well codecleanup of the old
implementation.

largeIcon support I did not add due that google does not support it
as well at current status...it is only a placeholder in
NotificationData

Change-Id: Ic5bb8998f64cac573d70005fad909104accc9e96