public void close() {
		try {
			context.unregisterReceiver(mPairingRequestBroadcastReceiver);
		} catch (final Exception e) {
			// The receiver must have been already unregistered before.
		}
		if (serverManager != null) {
			serverManager.removeManager(this);
		}
		requestHandler.close();
	}
Closes and releases resources. This method will be called automatically after
calling {@link #disconnect()}. When the device disconnected with link loss and
{@link ConnectRequest#shouldAutoConnect()} returned true you have to call this method to
close the connection.
ble/src/main/java/no/nordicsemi/android/ble/BleManager.java