[le audio] Block TBS calling operations for non-primary broadcast listeners

When in local broadcast, only primary device is allowed to control
calling.
This CL blocks the TBS operations if the device is active non-primary
local broadcast audio receivers.

Bug: 383416361
Flag: EXEMPT; trivial change covered by unit tests
Test: atest BassClientServiceTest TbsGenericTest LeAudioBroadcastServiceTest
Change-Id: I0ae71759cfa0986bb671dc28643aad554aa7b4b7