refactor(mobile): Refactor video player page and gallery bottom app bar (#7625)

* Fixes double video auto initialize issue and placeholder for video controller

* WIP unravel stack index

* Refactors video player controller

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fixing video

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Working

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* Fixes hide on pause

* Got hiding when tapped working

* Hides controls when video starts and fixes placeholder for memory card

Remove prints

* Fixes show controls with microtask

* fix LivePhotos not playing

* removes unused function callbacks and moves wakelock

* Update motion video

* Fixing motion photo playing

* Renames to isPlayingVideo

* Fixes playing video on change

* pause on dispose

* fixing issues with sync between controls

* Adds gallery app bar

* Switches to memoized

* Fixes pause

* Revert "Switches to memoized"

This reverts commit 234e6741dea05aa0b967dde746f1d625f15bed94.

* uses stateful widget

* Fixes double video play by using provider and new chewie video player

wip

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Fixes motion photos

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---------

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

mobile/lib/shared/ui/hooks/timer_hook.dart

@@ -0,0 +1,48 @@
+import 'package:async/async.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_hooks/flutter_hooks.dart';
+
+RestartableTimer useTimer(
+  Duration duration,
+  void Function() callback,
+) {
+  return use(
+    _TimerHook(
+      duration: duration,
+      callback: callback,
+    ),
+  );
+}
+
+class _TimerHook extends Hook<RestartableTimer> {
+  final Duration duration;
+  final void Function() callback;
+
+  const _TimerHook({
+    required this.duration,
+    required this.callback,
+  });
+  @override
+  HookState<RestartableTimer, Hook<RestartableTimer>> createState() =>
+      _TimerHookState();
+}
+
+class _TimerHookState extends HookState<RestartableTimer, _TimerHook> {
+  late RestartableTimer timer;
+  @override
+  void initHook() {
+    super.initHook();
+    timer = RestartableTimer(hook.duration, hook.callback);
+  }
+
+  @override
+  RestartableTimer build(BuildContext context) {
+    return timer;
+  }
+
+  @override
+  void dispose() {
+    timer.cancel();
+    super.dispose();
+  }
+}