refactor(mobile): Use hooks to manage Chewie controller for video (#7008)

* video loading delayed

* Chewie controller implemented in hook

* fixing look and feel

* Finalizing delay and animations

* Fixes issue with immersive mode showing immediately in videos

* format fix

* Fixes bug where video controls would hide immediately after showing while playing and reverts hide controls timer to 5 seconds

* Fixed rebase issues

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/lib/shared/models/asset.dart

@@ -171,6 +171,11 @@ class Asset {
 
   int? stackCount;
 
+  /// Aspect ratio of the asset
+  @ignore
+  double? get aspectRatio =>
+      width == null || height == null ? 0 : width! / height!;
+
   /// `true` if this [Asset] is present on the device
   @ignore
   bool get isLocal => localId != null;