[Media TTT] Add @SystemApis for new states of receiver devices

Adds SystemApi annotation to two new states that indicates if the transfer for receiver is
succeeded or failed. (ag/16730985) is a good reference.

Bug: 257301489
Test: atest MediaTttChipControllerReceiverTest
Change-Id: Ia0b44ef1188d37cf13f1adb38ccd9422b5703d36