Telephony: Implementation for IWLAN.

- Introduce new RAT as IWLAN.
CRs-Fixed: 600118

Handle IWLAN radio technology in ServiceState.
rilRadioTechnologyToNetworkType() in ServiceState returns UNKNOWN,
if radio technology is chosen as IWLAN.
Add the code to handle IWLAN radio technology in ServiceState.
CRs-Fixed: 641631

Telephony: Implementation of iwlan and wwan coexistence.
- A new callback event for unsol oem hook response.
CRs-Fixed: 628227

Change-Id: I96e4cb614843795ee9c13e02823cf7457fb1bda7
Conflicts:
core/res/res/values/config.xml
core/res/res/values/symbols.xml