contact: improve default contact picture

Change-Id: I02aaa6715995e2344a9227c2e3c3f70b74f5101f
diff --git a/ring-android/app/src/main/res/layout/tv_titleview.xml b/ring-android/app/src/main/res/layout/tv_titleview.xml
index 2d686d9..ca51798 100644
--- a/ring-android/app/src/main/res/layout/tv_titleview.xml
+++ b/ring-android/app/src/main/res/layout/tv_titleview.xml
@@ -54,5 +54,5 @@
         android:layout_gravity="center_vertical|end"
         android:layout_marginEnd="24dp"
         android:padding="6dp"
-        app:srcCompat="@drawable/ic_contact_picture" />
+        app:srcCompat="@drawable/ic_contact_picture_fallback" />
 </merge>
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