Moderate comments for `Note` objects via the REST API.

Reason: There's a chance that a self-hosted site might not have been added to the app that we received a notification for so we won't have any of the site data/credentials to moderate the comment view XML-RPC.
Fixes forever 'Loading...' display for comments on self-hosted sites.

Use android tools for text placeholders in `comment_detail_fragment`
Fixed a race condition that could cause the moderation toolbar to not appear.

If you moderated a comment and the API returned quickly, it could have tried to run `AniUtils.flyIn()` before `AniUtils.flyOut()` had completed its animation.
Added null check on `actionListener`.
Merge pull request #1663 from wordpress-mobile/issue/1654-jetpack-comment-moderation

Issue/1654 jetpack comment moderation
Merge branch 'release/3.0' into develop