Fix issue where icon was not centered properly.

Bug: 29250733
Change-Id: I5816e77fa3cb27ba92027e40e1c5cc51279ca8d2
diff --git a/core/res/res/layout-round-watch/alert_dialog_title_material.xml b/core/res/res/layout-round-watch/alert_dialog_title_material.xml
index 0279911..7e71e41 100644
--- a/core/res/res/layout-round-watch/alert_dialog_title_material.xml
+++ b/core/res/res/layout-round-watch/alert_dialog_title_material.xml
@@ -24,6 +24,7 @@
             android:maxHeight="24dp"
             android:maxWidth="24dp"
             android:layout_marginTop="12dp"
+            android:layout_gravity="center_horizontal"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:src="@null" />