Add relative APIs for InCallService that can support self-managed

connections that want to expose itself.

Add PhoneAccount#EXTRA_ADD_SELF_MANAGED_CALLS_TO_INCALLSERVICE and
Connection#onInCallServiceTrackingChanged.

Bug: 161144815
Test: CtsTelecomTestCases
Change-Id: I0a42ea79a1cd46aa9df3399c4fa2e9396321778a

telecomm/java/android/telecom/Connection.java

@@ -3013,6 +3013,26 @@ public abstract class Connection extends Conferenceable {
      */
     public void onCallAudioStateChanged(CallAudioState state) {}
 
+    /**
+     * Inform this Connection when it will or will not be tracked by an {@link InCallService} which
+     * can provide an InCall UI.
+     * This is primarily intended for use by Connections reported by self-managed
+     * {@link ConnectionService} which typically maintain their own UI.
+     *
+     * @param isUsingAlternativeUi Indicates whether an InCallService that can provide InCall UI is
+     *                             currently tracking the self-managed call.
+     */
+    public void onUsingAlternativeUi(boolean isUsingAlternativeUi) {}
+
+    /**
+     * Inform this Conenection when it will or will not be tracked by an non-UI
+     * {@link InCallService}.
+     *
+     * @param isTracked Indicates whether an non-UI InCallService is currently tracking the
+     *                 self-managed call.
+     */
+    public void onTrackedByNonUiService(boolean isTracked) {}
+
     /**
      * Notifies this Connection of an internal state change. This method is called after the
      * state is changed.