Fdhzb codebase clean up 866 (#927)

Issue: #866 


<!-- This is an auto-generated comment: release notes by OSS
Entelligence.AI -->
### Summary by Entelligence.AI

- Refactor: Streamlined the codebase by removing deprecated and unused
classes, functions, and widgets related to device connectivity, location
services, audio recording, Bluetooth management, and transcripts.
- Refactor: Updated import paths for various services and models across
the application for better organization and readability.
- Refactor: Adjusted function signatures and method calls in several
providers and services, enhancing code maintainability.
- Refactor: Improved code formatting and structure in multiple files,
enhancing readability and consistency.
- Chore: Removed unused imports and redundant code snippets from various
parts of the application.
<!-- end of auto-generated comment: release notes by OSS Entelligence.AI
-->

app/lib/backend/schema/bt_device.dart

@@ -1,7 +1,7 @@
 import 'package:flutter_blue_plus/flutter_blue_plus.dart';
-import 'package:friend_private/services/device_connections.dart';
-import 'package:friend_private/services/frame_connection.dart';
-import 'package:friend_private/utils/ble/gatt_utils.dart';
+import 'package:friend_private/services/devices/device_connection.dart';
+import 'package:friend_private/services/devices/frame_connection.dart';
+import 'package:friend_private/services/devices/models.dart';
 
 enum BleAudioCodec {
   pcm16,

app/lib/main.dart

@@ -1,5 +1,4 @@
 import 'dart:async';
-
 import 'package:firebase_auth/firebase_auth.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
@@ -29,7 +28,7 @@ import 'package:friend_private/providers/message_provider.dart';
 import 'package:friend_private/providers/onboarding_provider.dart';
 import 'package:friend_private/providers/plugin_provider.dart';
 import 'package:friend_private/providers/speech_profile_provider.dart';
-import 'package:friend_private/services/notification_service.dart';
+import 'package:friend_private/services/notifications.dart';
 import 'package:friend_private/services/services.dart';
 import 'package:friend_private/utils/analytics/gleap.dart';
 import 'package:friend_private/utils/analytics/growthbook.dart';
@@ -141,6 +140,7 @@ class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
     NotificationUtil.initializeNotificationsEventListeners();
     NotificationUtil.initializeIsolateReceivePort();
     WidgetsBinding.instance.addObserver(this);
+
     super.initState();
   }