Removes storing of bt peer key in internal flash for bad usb BLE

Co-authored-by: yocvito <nicolasmorel.dp@gmail.com>

applications/main/bad_kb/bad_kb_script.c

@@ -661,6 +661,8 @@ void bad_kb_bt_init(Bt* bt) {
     bt_mode_prev = bt_get_profile_pairing_method(bt);
     bt_set_profile_pairing_method(bt, GapPairingNone);
     furi_hal_bt_start_advertising();
+    // disable peer key adding to bt SRAM storage
+    bt_disable_peer_key_update(bad_usb->bt);
 
     connection_mode = BadKbConnectionModeBt;
 }
@@ -683,6 +685,9 @@ void bad_kb_bt_deinit(Bt* bt) {
     // if it happens, maybe we should increase the delay after bt_disconnect
     bt_set_profile(bt, BtProfileSerial);
 
+    // starts saving peer keys (bounded devices)
+    bt_enable_peer_key_update(bad_usb->bt);
+
     connection_mode = BadKbConnectionModeNone;
 }
 
@@ -827,7 +832,6 @@ static int32_t bad_kb_worker(void* context) {
                 furi_thread_flags_wait(0, FuriFlagWaitAny, 1500);
                 if(bad_kb->bt) {
                     update_bt_timeout(bad_kb->bt);
-                    FURI_LOG_I(WORKER_TAG, "BLE Key timeout : %u", bt_timeout);
                 }
                 bad_kb_script_set_keyboard_layout(bad_kb, bad_kb->keyboard_layout);
                 worker_state = BadKbStateRunning;

applications/services/bt/bt_service/bt.c

@@ -445,6 +445,15 @@ GapPairing bt_get_profile_pairing_method(Bt* bt) {
     return furi_hal_bt_get_profile_pairing_method(get_hal_bt_profile(bt->profile));
 }
 
+void bt_disable_peer_key_update(Bt *bt) {
+    UNUSED(bt);
+    furi_hal_bt_set_key_storage_change_callback(NULL, NULL);
+}
+
+void bt_enable_peer_key_update(Bt *bt) {
+    furi_hal_bt_set_key_storage_change_callback(bt_on_key_storage_change_callback, bt);
+}
+
 int32_t bt_srv(void* p) {
     UNUSED(p);
     Bt* bt = bt_alloc();

applications/services/bt/bt_service/bt.h

@@ -52,6 +52,17 @@ bool bt_remote_rssi(Bt* bt, BtRssi* rssi);
 void bt_set_profile_pairing_method(Bt* bt, GapPairing pairing_method);
 GapPairing bt_get_profile_pairing_method(Bt* bt);
 
+/** Stop saving new peer key to flash (in .bt.keys file)
+ * 
+*/
+void bt_disable_peer_key_update(Bt *bt);
+
+/** Enable saving peer key to internal flash (enable by default)
+ * 
+ * @note This function should be called if bt_disable_peer_key_update was called before
+*/
+void bt_enable_peer_key_update(Bt *bt);
+
 /** Disconnect from Central
  *
  * @param bt        Bt instance