Telephony: Initialize GsmCellLocation class members properly

Default values for class members mLac, mCid, mPsc would be 0.
Initialize these variables with -1 as 0 is considered as valid value.
CRs-Fixed: 406479

Change-Id: I08dc4031bb16293e80e5b7f51afcb8dc11747d3b
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