HFP: Send caller ID in +CLIP command (3/4)

* Append caller display name in ag_reslut data if there is name in
  CALL_STATE_INCOMING state
* Process all clip data and store the formatted string to ag_result
  data

Bug: 111378831
Test: runtest bluetooth, runtest -x BluetoothPhoneServiceTest.java
Change-Id: Ief48ed9cb5e0b32274624a90799ab9922dbd656e