frameworks/base: support devices with SoftAp that don't require firmware reload

Partial forward port from ICS.
Original Change-Id: If2db6e8ce675c3214ce645231c7a354f41ea0cc6

Conflicts:

	core/res/res/values/public.xml
	services/java/com/android/server/NetworkManagementService.java

Change-Id: I7912e12d30597cf50a5cf7a443c9d6b0b4dfda69