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

Add prompt support for SMS
 - Add prompt option in SMS multi sim settings.
 - New iterface API to get SMS prompt is enabled or not.
 - Disply prompt while sending SMS, if user selects
   prompt mode in multi sim settings.

Change Default subscription property name.
 - Change default subscription property name from
   persist.default.subscription to persist.radio.default.sub so
   that it can be set by radio group access processes.

Subscription specific for Mobile data, roaming and usage
 - Provide database flags as per subscription for both Mobile
   data and Data roaming options.
 - Add function to provide DDS susbcriber id.

Set priority when send sms
 - Add the priority support in 3gpp2 text message

Add support for emergency calls
 -Populate ecclist by reading ril.ecclist corresponds to
  each subscription.
 -If dialed number is present in consolidated ecclist then
  mark as emergency number.

Define invalid subscription constant
 -Define a new constant for invalid subscription id.

Third Party Intent Handling
 -Remove firing of below intents from TelephonyRegistry when
  Multisim is enabled, as they will be fired from MSimTelephonyReistry
  ACTION_SERVICE_STATE_CHANGED
  ACTION_SIGNAL_STRENGTH_CHANGED
  ACTION_ANY_DATA_CONNECTION_STATE_CHANGED
  ACTION_DATA_CONNECTION_FAILED
 -Remove below intent from both TelephonyRegistry & MSimTelephonyReistry
  as it will be fired in MSimDefaultNotifier.
   ACTION_PHONE_STATE_CHANGED

Change-Id: I6ee5d2a22e44fe7d0d68a41af0481ddbbbe21c3f