Re-add legacy soft-ap for kitkat (1/2)

Conflicts:
	services/java/com/android/server/NetworkManagementService.java

Conflicts:

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

Change-Id: Id4983f71d2a202770c075875006d9fbbdbf72a97