fix(badge, tooltip): Add A11yModule (#11586)

Author: josephperrott

src/lib/badge/badge-module.ts

@@ -8,11 +8,15 @@
 
 import {NgModule} from '@angular/core';
 import {MatCommonModule} from '@angular/material/core';
+import {A11yModule} from '@angular/cdk/a11y';
 import {MatBadge} from './badge';
 
 
 @NgModule({
-  imports: [MatCommonModule],
+  imports: [
+    A11yModule,
+    MatCommonModule
+  ],
   exports: [MatBadge],
   declarations: [MatBadge],
 })

src/lib/tooltip/tooltip-module.ts

@@ -7,6 +7,7 @@
  */
 
 import {OverlayModule} from '@angular/cdk/overlay';
+import {A11yModule} from '@angular/cdk/a11y';
 import {CommonModule} from '@angular/common';
 import {NgModule} from '@angular/core';
 import {MatCommonModule} from '@angular/material/core';
@@ -18,6 +19,7 @@ import {
 
 @NgModule({
   imports: [
+    A11yModule,
     CommonModule,
     OverlayModule,
     MatCommonModule,