Fix FindMy crash on boot when core2 is broken

applications/system/findmy/findmy_startup.c

@@ -1,9 +1,15 @@
 #include "findmy_state.h"
 #include <furi_hal.h>
+#include <bt/bt_service/bt.h>
 
 void findmy_startup() {
     if(!furi_hal_is_normal_boot()) return;
 
+    // Wait for BT init and check core2
+    furi_record_open(RECORD_BT);
+    furi_record_close(RECORD_BT);
+    if(!furi_hal_bt_is_gatt_gap_supported()) return;
+
     FindMyState state;
     if(findmy_state_load(&state)) {
         findmy_state_apply(&state);