Apn settings fixes / code maintainence

Depends on : http://review.cyanogenmod.com/#change,13743

Cleanup unecessary resources and use global ones
  - This fixes the duplicate id issue currently causing apn's to be un-editable

Bring the ui aspect of the preference up to speed with ics
 - Use ics highlight / layout...etc
 - Use fragments

Patchset 5 : Remove theme for ApnEditor
             Use static access for variables
Patchset 6 : Launch apn editor internally as a fragment
	     Replace deprecated managedQuery with CursorLoader

Change-Id: I069415b29846f30665ce76e52f04115d1b65e455
Makes the add button for new APNs appear in the action bar.

The APN add button (a plus sign) now appears in the action bar if possible. The APN list interface is now more consistent with the WiFi list interface. Previously the user had to press the 'Menu' hardware button or the three dot button on the screen in order to reveal the actions.

Change-Id: Iae622054ec080ba4775c22223dd75a865c83fc27
Signed-off-by: Manuel R. Ciosici <manuelrciosici@gmail.com>
Apn Settings : Fix panel title

Show appropriate apn editor title

Change-Id: I1f9dbce5dbf464db79d7c2fbedb8f833e4b46468