Component/bt: add BLE Compatibility Test demo

examples/bluetooth/ble_compatibility_test/main/ble_compatibility_test.h

@@ -0,0 +1,33 @@
+/*
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Attributes State Machine */
+enum
+{
+    IDX_SVC,
+    IDX_CHAR_A,
+    IDX_CHAR_VAL_A,
+    IDX_CHAR_CFG_A,
+
+    IDX_CHAR_B,
+    IDX_CHAR_VAL_B,
+    IDX_CHAR_CFG_B,
+
+    IDX_CHAR_C,
+    IDX_CHAR_VAL_C,
+    IDX_CHAR_CFG_C,
+    IDX_CHAR_CFG_C_2,
+
+    HRS_IDX_NB,
+};