Telephony(MSIM): Add support for MultiSim

Make changes to add support for MultiSim.

  -Add TelephonyManager and TelePhonyRegistry for MultiSim
  -Add ITelephony and IPhoneSubinfo aidl files for MultiSim
  -Extend ShutdownThread to close all radio's for MultiSim
  -Add Constants and Utils used for MultiSim

Change-Id: I6ee5d2a22e44fe7d0d68a41af0481ddbbbe21c3f

Conflicts:
	services/java/com/android/server/power/ShutdownThread.java