feat(ble_audio): Support using PAST in the cap/acceptor example

components/bt/esp_ble_iso/include/subsys/bluetooth/host/hci_core.h

@@ -78,10 +78,18 @@ struct bt_le_per_adv_sync {
     /** Advertiser PHY */
     uint8_t phy;
 
+    /** ACL conn that delivered PAST; BT_CONN_HANDLE_INVALID for non-PAST sync. */
+    uint16_t conn_handle;
+
     /** Flags */
     ATOMIC_DEFINE(flags, BT_PER_ADV_SYNC_NUM_FLAGS);
 };
 
+/* Port-level invalid conn_handle sentinel; matches NimBLE BLE_HS_CONN_HANDLE_NONE.
+ * Use in adapter-agnostic code that cannot reference NimBLE headers.
+ */
+#define BT_CONN_HANDLE_INVALID      0xffff
+
 struct bt_dev_le {
     /* LE features */
     uint8_t features[8];
@@ -97,6 +105,9 @@ struct bt_dev {
 
 extern struct bt_dev bt_dev;
 
+#define BT_LE_FEAT_SET(feat, n)     (feat[(n) >> 3] |= BIT((n) & 7))
+#define BT_LE_FEAT_UNSET(feat, n)   (feat[(n) >> 3] &= ~BIT((n) & 7))
+
 /* Data type to store state related with command to be updated
  * when command completes successfully.
  */