[#11586] Remove trailing @gmail.com when checking for user ID equality

[wkurniawan07]

Part of #11586

[xyliew25]

@wkurniawan07 I think isAllowedAccess = userInfo != null && googleId.equals(userInfo.id); in GetRegkeyValidityAction.java should be modified such that registered student/instructor can access the session submission/result page when clicked on the corresponding link.

Regarding profiles, I think getStudentProfileEntityFromDb() in ProfileDb.java should be modified such that StudentProfile of old googleId can be retrieved. As for profile pictures, since both PostStudentProfilePictureAction and DeleteStudentProfilePictureAction are w.r.t. to new googleId while GetStudentProfilePictureAction is w.r.t. to old googleId, I'm not sure yet (still trying out myself) but I think we need to change GetStudentProfilePictureAction such that it first retrieves profile picture of new googleId, if null, then retrieves the profile picture of old googleId, and change DeleteStudentProfilePictureAction such that it deletes profile pictures of both old and new googleId if any.

[wkurniawan07]

@xyliew25 I missed the first one, so good catch. Regarding profiles, given how rare it is used in recent times, I don't think it is worth it to fix. I even dare to say that it will not see any new usage by the time we migrated the old google IDs.

[xyliew25]

@wkurniawan07 noted on the profiles.

[xyliew25]

LGTM