IMS: IMS Registration and handover error codes support

- Add support for propagating IMS Registration error codes and error
 messages.
- Propagate the call session handover info to the UI
Change-Id: If2f2008734735f52614bd046fee144843a465ecf
4 files changed
tree: 29994f8ccad8a7362d80f7e5d4d17f16ae4d892d
  1. Android.mk
  2. CleanSpec.mk
  3. README.txt
  4. src/