Telephony(MSIM): Add support for MultiSim

- Changes to make class members to protected so that base
  classes can be extended for MultiSim.
  1. Add support for multiple rild in RIL.
  2. Overload methods in several modules to include sub info.
  3. Add MSIM SMS and MSIM Phonebook aidl files.

- MSimTelephonyManager, MSimSMSManager SDK implementation.

- CallManager changes for msim framework support
  1. Audio related changes to control audio on two subs.
  2. LCH support and setaudio parameter support for IMS calls.
  3. support to receive the sub specific vsid from Modem and
     use it while setting the audio states.
  4. Overload CallManager methods with subscription parameter
     to support DSDA PhoneApp functionality.
  5. Support to handle IMS calls from ExtCallManager.

Change-Id: I340cf22e99a42ae324f601ef7a808f13e550a6cf