Update RTT icon on ringing screen.

Bug: 67596257
Test: manual
PiperOrigin-RevId: 187551861
Change-Id: I38facbaaa48ba4afe29e382de9c8241d8936c3ab

assets/quantum/res/drawable/quantum_ic_rtt_vd_theme_24.xml

@@ -0,0 +1,25 @@
+<!--
+  ~ Copyright (C) 2018 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M9.03,3l-1.11,7.07h2.62l0.7,-4.5h2.58L11.8,18.43L9.47,18.43L9.06,21h7.27l0.4,-2.57h-2.35l2,-12.86h2.58l-0.71,4.5h2.65L22,3L9.03,3zM8,5L4,5l-0.31,2h4L8,5zM7.39,9h-4l-0.31,2h4l0.31,-2zM8.31,17h-6L2,19h6l0.31,-2zM8.93,13h-6l-0.31,2h6.01l0.3,-2z"/>
+</vector>

java/com/android/incallui/answer/impl/answermethod/FlingUpDownMethod.java

@@ -336,7 +336,7 @@ private void updateContactPuck() {
     if (getParent().isVideoCall() || getParent().isVideoUpgradeRequest()) {
       contactPuckIcon.setImageResource(R.drawable.quantum_ic_videocam_white_24);
     } else if (getParent().isRttCall()) {
-      contactPuckIcon.setImageResource(R.drawable.quantum_ic_call_white_24);
+      contactPuckIcon.setImageResource(R.drawable.quantum_ic_rtt_vd_theme_24);
     } else {
       contactPuckIcon.setImageResource(R.drawable.quantum_ic_call_white_24);
     }