Telephony: Implementation of IWLAN

-- Allow registration polling in radio off state.
-- Disable default APN if current RAT is IWLAN.
-- Allow non-default PDP activation in radio off state provided
current RAT is IWLAN.
CRs-Fixed: 600118

Telephony: Implementation of iwlan and wwan coexistence.
- Use unsol oem hook event to identify the coexistence of
wwan with iwlan.
- Allow default and ia apn type when wwan is available.
- Allow non-default pdp as long as iwlan is available.
CRs-Fixed: 628227

Conflicts:
	src/java/com/android/internal/telephony/CommandsInterface.java

Change-Id: I8f72e8ce7b5852d5b97d01412ee9ded99f85856c