Bug 955808 - Pre: Fix FxAccountClient sign API.
Bug 956844 - Part 1: Add {Abstract,Android}FxAccount.
Bug 956844 - Part 2: Implement FxAccountLoginPolicy.
Bug 956844 - Part 3: Use FxAccountLoginPolicy and remove old FxAccount class.
Bug 951304 - Pre: Add FxAccountAuthenticator.getFirefoxAccounts.
Bug 951304 - Part 0: Require recent version of Android support library, v4.
Bug 951304 - Part 1: Strings, basic layout and styles, Activity, and two Fragments.
Bug 951304 - Part 2: Linkify links.
Bug 951304 - Part 3: Add local error messaging and preliminary input validation.
Bug 951304 - Part 4: Add and use FxAccountLoginTask.
Bug 956839 - Add FxAccountStatusActivity.
Bug 956839 - Post: Show status activity if Firefox Account already exists.
Bug LOGIN - Allow {session,keyFetch}Token to be null.
Bug UI - Start removing fragments.
Bug UI - Add Android Accounts > Settings > Firefox Accounts link.
Bug UI - Be a little more clever about updating SyncResult.
Bug LOGIN - Start refactoring states.
Bug LOGIN - Rename FxAccountClient to FxAccountClient10.
Bug LOGIN - Refactor FxAccountLoginPolicy.
Bug LOGIN - Present quickStretchedPW to createAccount and login{AndGetKeys}.