Implement dialog for responding RTT request.

Bug: 67596257
Test: manual
PiperOrigin-RevId: 191365412
Change-Id: Ida741a837d6495c0d5f51b748f4d6c09a1beafec
diff --git a/java/com/android/incallui/InCallPresenter.java b/java/com/android/incallui/InCallPresenter.java
index e11b376..6300dac 100644
--- a/java/com/android/incallui/InCallPresenter.java
+++ b/java/com/android/incallui/InCallPresenter.java
@@ -894,6 +894,13 @@
   }
 
   @Override
+  public void onUpgradeToRtt(DialerCall call, int rttRequestId) {
+    if (inCallActivity != null) {
+      inCallActivity.showDialogForRttRequest(call, rttRequestId);
+    }
+  }
+
+  @Override
   public void onSessionModificationStateChange(DialerCall call) {
     int newState = call.getVideoTech().getSessionModificationState();
     LogUtil.i("InCallPresenter.onSessionModificationStateChange", "state: %d", newState);