fix(en/hstream): Rewrite the extension to make it work with the new site

[Claudemirovsky]

Closes #2471
Closes #2071

Note: The versionId property had to be bumped (to make aniyomi consider it a new source), so users will need to migrate after updating.

Checklist:

• Updated extVersionCode value in build.gradle for individual extensions
• Referenced all related issues in the PR body (e.g. "Closes #xyz")
• Added the containsNsfw = true flag in build.gradle when appropriate
• Have not changed source names
• Have explicitly kept the id if a source's name or language were changed
• Have tested the modifications by compiling and running the extension through Android Studio

[tmatzxzone]

subtitles not working on the latest extension