* Added support for surfaceTintColor and shadowColor to the Dialog widgets.
* Updated the defaults for Material.shadowColor and Material.surfaceTint to allow turning off the features with a transparent color.
* Added support for shadowColor and surfaceTintColor for Drawer widget.

This reverts commit b3aba4d9 because it breaks Google tests.

* Add ability to customize Drawer width

* Fix formatting

* More formatting

* Formatting again

* Add width to DrawerThemeData and add associated tests

* Fix test formatting