fix(material-experimental/mdc-core): add missing symbols

Aligns the public API of the MDC testing entry points with their non-MDC counterparts
to make migration between the two easier.

Author: crisbeto

scripts/check-mdc-exports-config.ts

@@ -7,6 +7,11 @@ export const config = {
       'MatChipListChange',
       'MatChipList'
     ],
+    'mdc-chips/testing': [
+      // Test harness code for a component that hasn't been implemented for MDC.
+      'MatChipListHarness',
+      'ChipListHarnessFilters'
+    ],
     'mdc-autocomplete': [
       // Private base classes that are only exported for MDC.
       '_MatAutocompleteBase',

src/material-experimental/mdc-button/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './button-harness';
+export {ButtonHarnessFilters} from '@angular/material/button/testing';

src/material-experimental/mdc-checkbox/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './checkbox-harness';
+export {CheckboxHarnessFilters} from '@angular/material/checkbox/testing';

src/material-experimental/mdc-menu/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './menu-harness';
+export {MenuHarnessFilters, MenuItemHarnessFilters} from '@angular/material/menu/testing';

src/material-experimental/mdc-progress-bar/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './progress-bar-harness';
+export {ProgressBarHarnessFilters} from '@angular/material/progress-bar/testing';

src/material-experimental/mdc-progress-spinner/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './progress-spinner-harness';
+export {ProgressSpinnerHarnessFilters} from '@angular/material/progress-spinner/testing';

src/material-experimental/mdc-slide-toggle/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './slide-toggle-harness';
+export {SlideToggleHarnessFilters} from '@angular/material/slide-toggle/testing';

src/material-experimental/mdc-slider/testing/public-api.ts

@@ -7,3 +7,4 @@
  */
 
 export * from './slider-harness';
+export {SliderHarnessFilters} from '@angular/material/slider/testing';