Handle refreshing profile image with expired OAuth token

Summary:
If OAuth token is expired then refreshing profile image doesn't work.
This diffs solves it this way:

• Hide Refresh Profile Image button with expired token.
• Display Refresh Token with expired token.
• Update token after logging-in.

Test Plan:
Wait until token expires.
/settings/page/facebook/ - no Refresh Profile Image button.
Refresh Token.
Refresh Profile Image.

Reviewers: epriestley, jungejason

Reviewed By: epriestley

CC: michalburger1, aran, Koolvin

Differential Revision: https://secure.phabricator.com/D2281