* alwaysUse24HourFormat in MediaQuery and time picker

* docs; dead code

* address some comments

* MaterialLocalizations.timeOfDayFormat is the single source of 24-hour-formattedness

* Make TimePickerDialog private again

* wire up MediaQueryData.fromWindow to Window

* upgrade intl data; use local numerals in date picker

* use the shiny new public intl API

* address comments

* Theme provides all TextStyle properties

* match field declaration order in the test

* Theme.of returns text style with inherit == false

* change TextStyle.inherit logic; docs

* add TextStyle.debugLabel

* address comments

* add debug labels to Typography text styles

* formatYear

* localize date picker

* tests

* clean-ups

* address comments

Temporary workaround to the fact that the Analyzer API
doesn't have a way to turn on asserts in initializers, coupled
with the fact that this file is being parsed by package:intl
using the Analyzer API.

* internationalize time numerals

* tests

* use foundation.dart instead of meta.dart

* address comments

* introduce localized text geometry in MaterialLocalizations

* remove geometry from color text themes

* fix merge conflict

* optional Localizations

* fix fallback; test; docs

* Internationalize the time picker

- header layout and formatting
- 12-hour vs 24-hour dial
- RTL

* make TimeOfDayFormat an enum

* address comments

* Introduce a Directionality inherited widget which sets the ambient LTR vs RTL mode (defaulting to null, which means you cannot use directionality-influenced values).

* Make it possible to configure Padding (including Container.padding and Container.margin) using a directionality-agnostic EdgeInsets variant.

* Provide textDirection and verticalDirection controls on Row and Column to make them RTL-aware.

* Introduce a variant of FractionalOffset based on the EdgeInsets variant. Not yet actually used.

* Fix all the tests that depended on Row defaulting to LTR.