Dismiss dialpad when user touches spaces above it.

Only applies if the user has not input any digits yet.

Bug: 11648799
Change-Id: I28a57fcd7eae0faaf5e234e9ec7531140903e2f5
diff --git a/res/layout/dialpad_fragment.xml b/res/layout/dialpad_fragment.xml
index 32b1d60..e673cea 100644
--- a/res/layout/dialpad_fragment.xml
+++ b/res/layout/dialpad_fragment.xml
@@ -19,7 +19,8 @@
     android:layout_height="match_parent"
     android:orientation="vertical" >
     <!-- spacer view -->
-    <Space
+    <View
+        android:id="@+id/spacer"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1" />