Display app certificate

Add a button in the installed application setting which displays a dialog with
package signature certificates details. The dialog contains a ViewPager with one
view per certificate.

Change-Id: I0f5d8e8881bfc34813a6589a1da012de48700628
Added support for EONS

Status will now recieve a sticky broadcast and update the operator name
accordingly.

Change-Id: I21b52864b68fbbfe8a3ebf1fc123ebef5833afcd