host/ble_audio.c: fix ble_audio_adv_parse_broadcast_announcement

[KKopyscinski]

data->success was set to false at every entry to the funcion. That made the valid advertising payload fail after parsing BLE_BROADCAST_PUB_ANNOUNCEMENT_SVC_UUID - final break in block was reached but the success set in parsing BLE_BROADCAST_AUDIO_ANNOUNCEMENT_SVC_UUID was cleared.

[KKopyscinski]

@MariuszSkamra PTAL