Add dynamic Preferences indexing (part 2)

- change the Index SQL model. Add a new "enabled" column.
- use that column for issuing a more restrictive search query
- change the SearchIndexProvider API to pass the "enable" state
- apply it to Bluetooth settings
- refactor the list of indexable resources (SearchIndexableResources)

Change-Id: Ic900fb27cb12a285a80d953aa1aa88f0070cd986

src/com/android/settings/bluetooth/BluetoothEnabler.java

@@ -28,6 +28,7 @@ import android.widget.Toast;
 
 import com.android.settings.R;
 import com.android.settings.WirelessSettings;
+import com.android.settings.search.Index;
 
 /**
  * BluetoothEnabler is a helper to manage the Bluetooth on/off checkbox
@@ -132,6 +133,7 @@ public final class BluetoothEnabler implements CompoundButton.OnCheckedChangeLis
             case BluetoothAdapter.STATE_ON:
                 setChecked(true);
                 mSwitch.setEnabled(true);
+                updateSearchIndex(true);
                 break;
             case BluetoothAdapter.STATE_TURNING_OFF:
                 mSwitch.setEnabled(false);
@@ -139,10 +141,12 @@ public final class BluetoothEnabler implements CompoundButton.OnCheckedChangeLis
             case BluetoothAdapter.STATE_OFF:
                 setChecked(false);
                 mSwitch.setEnabled(true);
+                updateSearchIndex(false);
                 break;
             default:
                 setChecked(false);
                 mSwitch.setEnabled(true);
+                updateSearchIndex(false);
         }
     }
 
@@ -159,4 +163,9 @@ public final class BluetoothEnabler implements CompoundButton.OnCheckedChangeLis
             }
         }
     }
+
+    private void updateSearchIndex(boolean isBluetoothOn) {
+        Index.getInstance(mContext).updateFromClassNameResource(
+                BluetoothSettings.class.getName(), isBluetoothOn);
+    }
 }