Persist video volume + playback speed between classifications

[goplayoutside3]

Package

lib-classifier

Linked Issue and/or Talk Post

Builds on top of #6655
Closes: #6334

Describe your changes

• Store volume and setVolume in MST subject viewer store so its value persists between subjects during classification
• Store videoSpeed and setVideoSpeed in MST subject viewer store

This feature applies only to workflows with drawing tools enabled (for now). It's intentional because the final step of my work on custom video controls will be to enable them on all video subjects, but for now I don't want to affect live projects.

How to Review

All design-related and accessibility-related changes are in #6655. This PR edits MST to enable persistent control preferences.

• lib-classifier's Storybook has a story With Drawing Enabled for the video subject viewer to review basic functionality
• To see video volume and speed persistence between subjects, make classifications on this test project workflow: https://localhost.zooniverse.org:3000/projects/goplayoutside3/fem-test-project/classify/workflow/28230?env=production

Checklist

PR Creator - Please cater the checklist to fit the review needed for your code changes.
PR Reviewer - Use the checklist during your review. Each point should be checkmarked or discussed before PR approval.

General

• Tests are passing locally and on Github
• Documentation is up to date and changelog has been updated if appropriate
• You can yarn panic && yarn bootstrap or docker-compose up --build and FEM works as expected
• FEM works in all major desktop browsers: Firefox, Chrome, Edge, Safari (Use Browserstack account as needed)
• FEM works in a mobile browser

General UX

Example Staging Project: i-fancy-cats

• All pages of a FEM project load: Home Page, Classify Page, and About Pages
• Can submit a classification
• Can sign-in and sign-out
• The component is accessible
  • Can be used with a screen reader BBC guide to VoiceOver
  • Can be used from the keyboard WebAIM guide to keyboard testing
  • It is passing accessibility checks in the storybook

New Feature

• The PR creator has listed user actions to use when testing the new feature
• Unit tests are included for the new feature
• A storybook story has been created or updated
  • Example of SlideTutorial component with docgen comments, and its story