Use device type of MediaRoute2Info to classify MediaDevice

- This CL use device type of MediaRoute2Info to classify
  MediaDevice(e.g: BluetoothMediaDevice, InfoMediaDevice,
  PhoneMediaDevice).
- Move connect()/disconnect() methood to MediaDevice.java
- Add test case

Bug: 148765806
Test: make -j42 RunSettingsLibRoboTests
Change-Id: I9fa22d36cebea1f55fd3a5e389aca4e6abaa1797