Creating connections for conference event package participants.

- Add "addExistingConnection" method to connection service which provides
a way for a connection service to notify telecom of a pre-existing
connection (connections are normally created through telecom).
- Modify TelephonyConferenceController to retrieve its state from a
multiparty connection in the conference (in the case of IMS calls, this
would be the ImsCall that manages the conference) instead of just taking
the first one.

Bug: 18057361
Change-Id: I26993aec54ecb0ce90ae6983fd3eed9d8d0a5773

telecomm/java/android/telecom/RemoteConnection.java

@@ -406,6 +406,29 @@ public final class RemoteConnection {
         mState = Connection.STATE_INITIALIZING;
     }
 
+    /**
+     * @hide
+     */
+    RemoteConnection(String callId, IConnectionService connectionService,
+            ParcelableConnection connection) {
+        mConnectionId = callId;
+        mConnectionService = connectionService;
+        mConnected = true;
+        mState = connection.getState();
+        mDisconnectCause = connection.getDisconnectCause();
+        mRingbackRequested = connection.isRingbackRequested();
+        mCallCapabilities = connection.getCapabilities();
+        mVideoState = connection.getVideoState();
+        mVideoProvider = new RemoteConnection.VideoProvider(connection.getVideoProvider());
+        mIsVoipAudioMode = connection.getIsVoipAudioMode();
+        mStatusHints = connection.getStatusHints();
+        mAddress = connection.getHandle();
+        mAddressPresentation = connection.getHandlePresentation();
+        mCallerDisplayName = connection.getCallerDisplayName();
+        mCallerDisplayNamePresentation = connection.getCallerDisplayNamePresentation();
+        mConference = null;
+    }
+
     /**
      * Create a RemoteConnection which is used for failed connections. Note that using it for any
      * "real" purpose will almost certainly fail. Callers should note the failure and act
@@ -415,7 +438,7 @@ public final class RemoteConnection {
      * @hide
      */
     RemoteConnection(DisconnectCause disconnectCause) {
-        this("NULL", null, null);
+        mConnectionId = "NULL";
         mConnected = false;
         mState = Connection.STATE_DISCONNECTED;
         mDisconnectCause = disconnectCause;