@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP_MR1)
	final void onMtuChanged(@NonNull final BluetoothGattServer server,
							@NonNull final BluetoothDevice device,
							final int mtu) {
		log(Log.INFO, () -> "[Server] MTU changed to: " + mtu);
		BleManagerHandler.this.mtu = Math.min(515, mtu);
		nextRequest(checkCondition());
	}
Callback indicating the connection parameters were updated. Works on Android 8+.

@param gatt     GATT client involved.
@param interval Connection interval used on this connection, 1.25ms unit.
                Valid range is from 6 (7.5ms) to 3200 (4000ms).
@param latency  Slave latency for the connection in number of connection events.
                Valid range is from 0 to 499.
@param timeout  Supervision timeout for this connection, in 10ms unit.
                Valid range is from 10 (0.1s) to 3200 (32s)
@param status   {@link BluetoothGatt#GATT_SUCCESS} if the connection has been updated
                successfully.
ble/src/main/java/no/nordicsemi/android/ble/BleManagerHandler.java