Add Disable Comment Loading to Data Saver Settings

[CThompson01]

Feature Description

Added the ability to disable comment fetching from the data saver settings when viewing the post details screen. This allows for posts that are too long for the preview to be viewed fully without loading comments.

The setting added is shown below.

Reason for Adding the Feature

This is a feature that I have seen other apps implement and can be helpful for users who need to save data or just don't care about viewing comments. Users will mostly get use out of this feature when viewing posts that are lengthy and too long to be shown fully without viewing the post details screen.

[Docile-Alligator]

Thank you. But changes in PostRecyclerViewAdapter is not needed since comment loading happens in ViewPostDetailFragment. For the same reason, ChangeDisableCommentLoadingEvent should be removed too since we do not have to observe the preference change.