Adding search for dynamic accessibility settings.

The accessibility service list is dynamically constructed, therefore we
need a local provider that will emit accessibility service data to be
indexed.

bug:13928519

Change-Id: Idd29cd1698f36b54fabf013dfa36029412bbb8a9

src/com/android/settings/search/SearchIndexableResources.java

@@ -186,7 +186,7 @@ public final class SearchIndexableResources {
 
         sResMap.put(AccessibilitySettings.class.getName(),
                 new SearchIndexableResource(RANK_ACCESSIBILITY,
-                        R.xml.accessibility_settings,
+                        NO_DATA_RES_ID,
                         AccessibilitySettings.class.getName(),
                         R.drawable.ic_settings_accessibility));