Only save brightness on resume fullscreen if use system brightness is enabled

Changelog: changed

app/src/main/java/com/futo/platformplayer/fragment/mainactivity/main/VideoDetailView.kt

@@ -2539,8 +2539,10 @@ class VideoDetailView : ConstraintLayout {
     }
 
     fun saveBrightness() {
+        if (Settings.instance.gestureControls.useSystemBrightness) {
             _player.gestureControl.saveBrightness()
         }
+    }
     fun restoreBrightness() {
         _player.gestureControl.restoreBrightness()
     }