Make printers for a print service not react to press.

We show a list of printers for the a print service in the
print service settings activity. This list is there to
inform the user of which printers are available and
optionally offers adding a printer affordance. The printer
list items do nothing so they should not react to press
and create a false impression they do.

bug:10983508

Change-Id: I43b19ebb0acf6662c489826c192fd6daf8ad103d
diff --git a/src/com/android/settings/print/PrintServiceSettingsFragment.java b/src/com/android/settings/print/PrintServiceSettingsFragment.java
index c10f4b9..f739b4d 100644
--- a/src/com/android/settings/print/PrintServiceSettingsFragment.java
+++ b/src/com/android/settings/print/PrintServiceSettingsFragment.java
@@ -640,6 +640,11 @@
         }
 
         @Override
+        public boolean isEnabled(int position) {
+            return false;
+        }
+
+        @Override
         public Loader<List<PrinterInfo>> onCreateLoader(int id, Bundle args) {
             if (id == LOADER_ID_PRINTERS_LOADER) {
                 return new PrintersLoader(getActivity());