Merge "le_audio: Make allowed context test more strict" into main

  ASSERT_NE(group_id, bluetooth::groups::kGroupUnknown);

  EXPECT_CALL(*mock_le_audio_source_hal_client_, Start(_, _, _)).Times(1);

  types::BidirectionalPair<types::AudioContexts> metadata = {.sink = types::AudioContexts(),

                                                             .source = types::AudioContexts()};

  EXPECT_CALL(mock_state_machine_,

              StartStream(_, types::LeAudioContextType::SOUNDEFFECTS, metadata, _))

  EXPECT_CALL(mock_state_machine_, StartStream(_, types::LeAudioContextType::SOUNDEFFECTS, _, _))

          .Times(0);

  LeAudioClient::Get()->GroupSetActive(group_id);