Add indexing for cached Bluetooth (BT) paired devices

- comply to the SEARCH_INDEX_DATA_PROVIDER
- add to the Index the name of previously paired BT devices
(this will work for now only and only if BT has been on during
the indexing)

Change-Id: I00065db0f4e9657cca3578a2fafa0ec39cfaa432

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

@@ -54,7 +54,7 @@ public class SettingsSearchIndexablesProvider extends SearchIndexablesProvider {
             new SearchIndexableResource(1, NO_DATA_RES_ID,
                     WifiSettings.class.getName(),
                     R.drawable.ic_settings_wireless),
-            new SearchIndexableResource(2, R.xml.bluetooth_settings,
+            new SearchIndexableResource(2, NO_DATA_RES_ID,
                     BluetoothSettings.class.getName(),
                     R.drawable.ic_settings_bluetooth2),
             new SearchIndexableResource(3, R.xml.data_usage_metered_prefs,