Bluetooth: samples: bap_broadcast_sink sample resets on broadcast code received

[jthm-ot]

Describe the bug When a broadcast assistant connected to the bap_broadcast_sink sample adds an encrypted source, then bap_broadcast_sink sample unexpected does a reset, when the requested broadcast code is proved by the assistant.

To Reproduce Steps to reproduce the behavior:

1. Disable scan self In the bap_broadcast_sink sample (CONFIG_SCAN_SELF=n)
2. Build and flash bap_broadcast_sink sample (e.g. nRF5340 Audio DK board)
3. Add an encrypted source from the broadcast assistant
4. Provide broadcast code from the broadcast assistant when requested

Expected behavior The bap_broadcast_sink sample should be waiting for BIS sync request after broadcast code received

Impact The bap_broadcast_sink sample will not be able to recieve the stream

Logs and console output

Terminal log when error occurs:

Broadcast Sink created, waiting for BASE Receive state updated, pa sync state: 2 subgroup 0 bis_sync: 0x00000000 Received BASE with 1 subgroups from broadcast sink 0x2000729c bis_index_bitfield = 0x00000002 Receive state updated, pa sync state: 2 subgroup 0 bis_sync: 0x00000000 Broadcast sink (0x2000729c) is syncable, BIG encrypted BASE received, waiting for syncable Waiting for broadcast code Broadcast code received for 0x20007438 sem_broadcast_code_received timed out, resetting Reset

Expected terminal log:

Broadcast source PA synced, creating Broadcast Sink Broadcast Sink created, waiting for BASE Receive state updated, pa sync state: 2 subgroup 0 bis_sync: 0x00000000 Received BASE with 1 subgroups from broadcast sink 0x2000729c bis_index_bitfield = 0x00000002 Receive state updated, pa sync state: 2 subgroup 0 bis_sync: 0x00000000 Broadcast sink (0x2000729c) is syncable, BIG encrypted BASE received, waiting for syncable Waiting for broadcast code Broadcast code received for 0x20007438 Waiting for BIS sync request

Zephyr SHA used: 2457f730f43079d8d0626f6dee6f51765a29605d

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