Fix build

Change-Id: I898f895d66b990cbf53d1a6724c18d280cbe80cd

Author: samtstern

storage/app/src/main/res/layout/activity_firebase_ui.xml

@@ -9,6 +9,8 @@
     <ImageView
         android:id="@+id/imageView"
         android:layout_width="wrap_content"
-        android:layout_height="wrap_content" />
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent" />
 
 </android.support.constraint.ConstraintLayout>