Ignore clicks on disabled pie menu items.

  bug:11205671

Change-Id: I8b7c8c6b95f2cedadc064747470acd742280eb7f
diff --git a/src/com/android/camera/PieController.java b/src/com/android/camera/PieController.java
index 3cbcb4b..6224401 100644
--- a/src/com/android/camera/PieController.java
+++ b/src/com/android/camera/PieController.java
@@ -156,6 +156,9 @@
             item.setOnClickListener(new OnClickListener() {
                 @Override
                 public void onClick(PieItem item) {
+                    if (!item.isEnabled()) {
+                        return;
+                    }
                     IconListPreference pref = (IconListPreference) mPreferenceGroup
                             .findPreference(prefKey);
                     int index = pref.findIndexOfValue(pref.getValue());