Implement background sync for xmr using flutter_daemon (#2094)

* Implement background sync for xmr using flutter_daemon

* - initialize app config in background thread
- initializeAppConfigs without loading the wallet.

* - properly do awaited calls in methodChannel
- prevent locking main thread during background sync

* add back background sync debug page
fix issues caused by xmr wallet being view only (and read only)

* changes from review
improve starting of bgsync task

* update stopBackgroundSync, await listener functions, ensure that listener always start (call _start in constructor)

* DO-NOT-MERGE: extre verbose monero logs

* stop background service when app is being opened

* improve monitoring of background sync

* update flutter_daemon to ensure network constraint
prevent throwing errors on isBackgroundSyncEnabled
check network before syncing

* Update lib/main.dart

* revert Update main.dart [skip ci]

* continously run network check

* disable charging requirement,
fix status reporting of background sync in UI

* Refactor background sync logic, and add UI notifications for battery optimization. Updated flutter_daemon version modified build.gradle for signing config to allow testing in both release and debug modes.

* verbose monero only when requested in code.
Do not start background sync when battery optimization is on

* fix background sync mode not properly reflecting state changes

* drop unnecessary dependency

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

lib/src/screens/settings/other_settings_page.dart

@@ -10,6 +10,7 @@ import 'package:cake_wallet/src/screens/settings/widgets/settings_switcher_cell.
 import 'package:cake_wallet/src/screens/settings/widgets/settings_version_cell.dart';
 import 'package:cake_wallet/view_model/settings/other_settings_view_model.dart';
 import 'package:cw_core/wallet_type.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
 
@@ -63,6 +64,12 @@ class OtherSettingsPage extends BasePage {
                 handler: (BuildContext context) =>
                     Navigator.of(context).pushNamed(Routes.readDisclaimer),
               ),
+              if (kDebugMode && _otherSettingsViewModel.walletType == WalletType.monero) 
+                SettingsCellWithArrow(
+                  title: '[dev] monero background sync',
+                  handler: (BuildContext context) =>
+                      Navigator.of(context).pushNamed(Routes.devMoneroBackgroundSync),
+                ),
               Spacer(),
               SettingsVersionCell(
                   title: S.of(context).version(_otherSettingsViewModel.currentVersion)),