Address code review feedback: track screen-on flag and remove redundant call

Co-authored-by: YBTopaz8 <41630728+YBTopaz8@users.noreply.github.com>

Author: Copilot

Dimmer/Dimmer.Droid/ViewsAndPages/NativeViews/LyricsViewFragment.cs

@@ -26,6 +26,7 @@ internal class LyricsViewFragment : Fragment
     private LyricsAdapter _adapter;
     private ImageView _backgroundImageView;
     private TextView _songTitleTv, _artistAlbumTv;
+    private bool _isScreenKeepOnSetByThisFragment = false;
 
     public LyricsViewFragment(BaseViewModelAnd viewModel)
     {
@@ -123,7 +124,6 @@ public override void OnViewCreated(View view, Bundle? savedInstanceState)
     {
         base.OnViewCreated(view, savedInstanceState);
         viewModel.CurrentFragment = this;
-        UpdateScreenKeepOn();
     }
 
     public override void OnResume()
@@ -140,17 +140,19 @@ public override void OnPause()
 
     private void UpdateScreenKeepOn()
     {
-        if (viewModel?.KeepScreenOnDuringLyrics == true && Activity?.Window != null)
+        if (viewModel?.KeepScreenOnDuringLyrics == true && Activity?.Window != null && !_isScreenKeepOnSetByThisFragment)
         {
             Activity.Window.AddFlags(WindowManagerFlags.KeepScreenOn);
+            _isScreenKeepOnSetByThisFragment = true;
         }
     }
 
     private void ClearScreenKeepOn()
     {
-        if (Activity?.Window != null)
+        if (_isScreenKeepOnSetByThisFragment && Activity?.Window != null)
         {
             Activity.Window.ClearFlags(WindowManagerFlags.KeepScreenOn);
+            _isScreenKeepOnSetByThisFragment = false;
         }
     }
     private void SetupBindings()