Fix for the proximity sensor.

- The blank view we were displaying over the screen when the proximity
  sensor was active was not actually stopping keypresses - it was as
  though it was transparent.

Bug: 5283095
Change-Id: I8a772fb3faad3707adf0fd04b302130d18b7c73b
diff --git a/res/layout/call_detail.xml b/res/layout/call_detail.xml
index 076f37f..936bca8 100644
--- a/res/layout/call_detail.xml
+++ b/res/layout/call_detail.xml
@@ -209,5 +209,6 @@
         android:layout_alignParentTop="true"
         android:background="#000000"
         android:visibility="gone"
+        android:clickable="true"
     />
 </RelativeLayout>