fix g3

Author: mmalerba

src/material/_index.scss

@@ -53,7 +53,8 @@
 // Theme bundles
 @forward './core/theming/all-theme' show all-component-themes;
 @forward './core/color/all-color' show all-component-colors;
-@forward './core/typography/all-typography' show all-component-typographies;
+@forward './core/typography/all-typography' show all-component-typographies,
+  define-mdc-typography-config;
 @forward './legacy-core/theming/all-theme' show all-legacy-component-themes;
 @forward './legacy-core/color/all-color' show all-legacy-component-colors;
 @forward './legacy-core/typography/all-typography' show all-legacy-component-typographies;