fix: preserve animations

mobile/apps/photos/lib/ui/common/linear_progress_dialog.dart

@@ -25,6 +25,7 @@ class LinearProgressDialogState extends State<LinearProgressDialog>
     controller = AnimationController(
       vsync: this,
       duration: const Duration(milliseconds: 300),
+      animationBehavior: AnimationBehavior.preserve,
     );
 
     _tween = Tween<double>(begin: _target, end: _target);

mobile/apps/photos/lib/ui/huge_listview/draggable_scrollbar.dart

@@ -75,6 +75,7 @@ class DraggableScrollbarState extends State<DraggableScrollbar>
     _thumbAnimationController = AnimationController(
       vsync: this,
       duration: thumbAnimationDuration,
+      animationBehavior: AnimationBehavior.preserve,
     );
 
     _thumbAnimation = CurvedAnimation(
@@ -85,6 +86,7 @@ class DraggableScrollbarState extends State<DraggableScrollbar>
     _labelAnimationController = AnimationController(
       vsync: this,
       duration: labelAnimationDuration,
+      animationBehavior: AnimationBehavior.preserve,
     );
 
     _labelAnimation = CurvedAnimation(

mobile/apps/photos/lib/ui/tabs/nav_bar.dart

@@ -291,9 +291,11 @@ class _ButtonState extends State<Button> with TickerProviderStateMixin {
   void initState() {
     super.initState();
     _expanded = widget.active;
-    expandController =
-        AnimationController(vsync: this, duration: widget.duration)
-          ..addListener(() => setState(() {}));
+    expandController = AnimationController(
+      vsync: this,
+      duration: widget.duration,
+      animationBehavior: AnimationBehavior.preserve,
+    )..addListener(() => setState(() {}));
   }
 
   @override

mobile/apps/photos/lib/ui/viewer/file/native_video_player_controls/seek_bar.dart

@@ -32,6 +32,7 @@ class _SeekBarState extends State<SeekBar> with SingleTickerProviderStateMixin {
 
     _animationController = AnimationController(
       vsync: this,
+      animationBehavior: AnimationBehavior.preserve,
       value: 0,
     );
 

mobile/apps/photos/lib/ui/viewer/people/person_gallery_suggestion.dart

@@ -65,10 +65,12 @@ class _PersonGallerySuggestionState extends State<PersonGallerySuggestion>
     _slideController = AnimationController(
       duration: const Duration(milliseconds: 300),
       vsync: this,
+      animationBehavior: AnimationBehavior.preserve,
     );
     _fadeController = AnimationController(
       duration: const Duration(milliseconds: 200),
       vsync: this,
+      animationBehavior: AnimationBehavior.preserve,
     );
 
     _slideAnimation = Tween<Offset>(