Merge "Improve doc for TileService"

 * <li>{@link #onTileAdded()} and {@link #onTileRemoved()} may be called outside of the

 * {@link #onCreate()} - {@link #onDestroy()} window</li>

 * </ul>

 * <p>TileService will be detected by tiles that match the {@value #ACTION_QS_TILE}

 * and require the permission "android.permission.BIND_QUICK_SETTINGS_TILE".

 * <p>TileService will resolve against services that match the {@value #ACTION_QS_TILE} action

 * and require the permission {@code android.permission.BIND_QUICK_SETTINGS_TILE}.

 * The label and icon for the service will be used as the default label and

 * icon for the tile. Here is an example TileService declaration.</p>

 * <pre class="prettyprint">