Move some transport operations to Trampoline

From BMS. Namely:
* initializeTransports()
* clearBackupData()
* getCurrentTransport()
* getCurrentTransportComponent()
* listAllTransports()
* listAllTransportComponents()

Test: atest BackupManagerServiceTest TrampolineRoboTest TrampolineTest
Bug: 135661048
Change-Id: Ib81550b4da7615f3713c340beccd3f85eb08ca7f
5 files changed