Bug 956844 - Pre: Let Utils.toCommaSeparatedString take any Object.
Bug 956844 - Pre: Rename FxAccountClient to FxAccountClient10.
Bug 956844 - Pre: Fix FxAccountClient sign API.
Bug 956844 - Pre: Present quickStretchedPW instead of password.
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 956844 - Part 0: renaming and quickStretchedPW. r=rnewman
Bug 956844 - Part 1: add AbstractFxAccount, AndroidFxAccount. r=rnewman
Bug 956844 - Part 2: implement FxAccountLoginPolicy. r=rnewman
Bug 956844 - Part 3: use FxAccountLoginPolicy and remove old FxAccount class. r=rnewman