LE Audio: do not hardcode TMAP role mask

When initializing TMAP role mask in LeAudioService, make it a
function of enabled services.

Bug: 399410466
Bug: 399410612
Bug: 369150497
Test: atest LeAudioServiceTest
Flag: com.android.bluetooth.flags.do_not_hardcode_tmap_role_mask
Change-Id: If7c3e693a9872cb049b7141c5afdc37941916234