[FL-580] Prepare BLE for certification (#376)

* api-hal-bt: separate bt init to core init and app start

* bt: add continuous TX and RX tests

* bt: finish rx test on Back button click

* api-hal-bt: check core 2 started, same f4 and f5 implementation

* bt: refactoring, move hopping test logic to main thread

Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f5/ble-glue/app_ble.h

@@ -18,6 +18,7 @@ typedef enum {
 } APP_BLE_ConnStatus_t;
 
 bool APP_BLE_Init();
+bool APP_BLE_Start();
 
 APP_BLE_ConnStatus_t APP_BLE_Get_Server_Connection_Status();