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>

pubspec_base.yaml

@@ -68,7 +68,6 @@ dependencies:
    git:
      url: https://github.com/MrCyjaneK/device_display_brightness.git
      ref: 4cac18c446ce686f3d75b1565badbd7da439bbd9
-  workmanager: ^0.5.2
   wakelock_plus: ^1.2.5
   flutter_mailer:       
     git:
@@ -119,6 +118,10 @@ dependencies:
     git:
       url: https://github.com/cake-tech/blockchain_utils
       ref: cake-update-v2
+  flutter_daemon:
+    git:
+      url: https://github.com/MrCyjaneK/flutter_daemon
+      ref: 5c369e0e69e6f459357b9802bc694a221397298a
 
 dev_dependencies:
   flutter_test: