[FL-2809] Rework BLE key storage (#2154)

* bt: disconnect first on profile change
* bt keys: rework bt keys
* saved struct: add payload size getter to API
* bt: rework bt with new key storage API
* bt: add keys storage operation to bt API
* hid: save bt keys on sd card
* bt: add unit tests for key storage
* bt: working profile switch
* bt: cleanup
* bt hid: change keys storage path

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

applications/debug/unit_tests/test_index.c

@@ -24,6 +24,7 @@ int run_minunit_test_protocol_dict();
 int run_minunit_test_lfrfid_protocols();
 int run_minunit_test_nfc();
 int run_minunit_test_bit_lib();
+int run_minunit_test_bt();
 
 typedef int (*UnitTestEntry)();
 
@@ -49,6 +50,7 @@ const UnitTest unit_tests[] = {
     {.name = "protocol_dict", .entry = run_minunit_test_protocol_dict},
     {.name = "lfrfid", .entry = run_minunit_test_lfrfid_protocols},
     {.name = "bit_lib", .entry = run_minunit_test_bit_lib},
+    {.name = "bt", .entry = run_minunit_test_bt},
 };
 
 void minunit_print_progress() {