HCE foreground support.

Allow users to configure they want to favor the foreground
app for tap&pay.
Change-Id: I25e1058e84f468e47fd40f43b65389c04373a3ab

res/layout/nfc_payment_option.xml

@@ -19,7 +19,7 @@
     android:layout_weight="1"
     android:id="@+id/nfc_payment_pref"
     android:focusable="true"
-    android:clickable="true"
+    android:clickable="false"
     android:gravity="center_vertical"
     android:paddingTop="10dp"
     android:paddingBottom="10dp"
@@ -37,6 +37,7 @@
             android:layout_width="wrap_content"
             android:layout_height="96dp"
             android:scaleType="centerInside"
+            android:clickable="true"
                 />
     </FrameLayout>
     <RadioButton
@@ -46,6 +47,6 @@
         android:layout_alignParentEnd="true"
         android:layout_centerVertical="true"
         android:duplicateParentState="true"
-        android:clickable="false"
+        android:clickable="true"
         android:focusable="false" />
 </RelativeLayout>