fix(nimble): Defer Events / ATT related information from stack

Defer Events/ ATT related GAP events from stack until connection
 event is sent to GAP layer

components/bt/host/nimble/Kconfig.in

@@ -349,6 +349,16 @@ menu "GAP"
             Enable this option to send number-of-completed-packets event to
             controller after disconnection
 
+    config BT_NIMBLE_DEFER_CONN_EVENTS_UNTIL_CONNECT
+        bool "Defer connection GAP/ATT events until CONNECT callback"
+        depends on BT_NIMBLE_ENABLED
+        default y
+        help
+            Queue connection-related GAP callbacks and ATT server requests until
+            BLE_GAP_EVENT_CONNECT event is delivered for that connection handle.
+            Required when the host delays CONNECT so applications never receive other
+            events before CONNECT event.
+
 endmenu #GAP
 
 menu "GATT / ATT"

components/bt/host/nimble/port/include/esp_nimble_cfg.h

@@ -2390,4 +2390,13 @@
 #endif
 #endif
 
+#ifndef MYNEWT_VAL_BLE_DEFER_CONN_EVENTS
+#ifdef CONFIG_BT_NIMBLE_DEFER_CONN_EVENTS_UNTIL_CONNECT
+#define MYNEWT_VAL_BLE_DEFER_CONN_EVENTS CONFIG_BT_NIMBLE_DEFER_CONN_EVENTS_UNTIL_CONNECT
+#else
+#define MYNEWT_VAL_BLE_DEFER_CONN_EVENTS (0)
+#endif
+#endif
+
+
 #endif