fix(examples): add missing module imports and exports (#10947)

material.angular.io Bottom Sheet docs threw exceptions

Relates to angular/material.angular.io#426

Author: Splaktar

src/material-examples/material-module.ts

@@ -3,20 +3,22 @@ import {NgModule} from '@angular/core';
 import {CdkTableModule} from '@angular/cdk/table';
 import {CdkTreeModule} from '@angular/cdk/tree';
 import {
-  MatAutocompleteModule, MatButtonModule, MatButtonToggleModule, MatPaginatorModule,
-  MatCardModule, MatCheckboxModule, MatChipsModule, MatDatepickerModule,
-  MatDialogModule, MatDividerModule, MatGridListModule, MatIconModule, MatInputModule,
-  MatListModule, MatMenuModule, MatProgressBarModule, MatProgressSpinnerModule,
-  MatRadioModule, MatSelectModule, MatSidenavModule, MatSliderModule, MatSortModule,
-  MatSlideToggleModule, MatSnackBarModule, MatTableModule, MatTabsModule, MatToolbarModule,
-  MatTooltipModule, MatFormFieldModule, MatExpansionModule, MatStepperModule, MatTreeModule
+  MatAutocompleteModule, MatBadgeModule, MatBottomSheetModule, MatButtonModule,
+  MatButtonToggleModule, MatCardModule, MatCheckboxModule, MatChipsModule, MatDatepickerModule,
+  MatDialogModule, MatDividerModule, MatExpansionModule, MatFormFieldModule, MatGridListModule,
+  MatIconModule, MatInputModule, MatListModule, MatMenuModule, MatPaginatorModule,
+  MatProgressBarModule, MatProgressSpinnerModule, MatRadioModule, MatRippleModule, MatSelectModule,
+  MatSidenavModule, MatSliderModule, MatSlideToggleModule, MatSnackBarModule, MatSortModule,
+  MatStepperModule, MatTableModule, MatTabsModule, MatToolbarModule, MatTooltipModule, MatTreeModule
 } from '@angular/material';
 
 @NgModule({
   imports: [
     CdkTableModule,
     CdkTreeModule,
     MatAutocompleteModule,
+    MatBadgeModule,
+    MatBottomSheetModule,
     MatButtonModule,
     MatButtonToggleModule,
     MatCardModule,
@@ -36,6 +38,7 @@ import {
     MatProgressBarModule,
     MatProgressSpinnerModule,
     MatRadioModule,
+    MatRippleModule,
     MatSelectModule,
     MatSidenavModule,
     MatSlideToggleModule,
@@ -53,6 +56,8 @@ import {
     CdkTableModule,
     CdkTreeModule,
     MatAutocompleteModule,
+    MatBadgeModule,
+    MatBottomSheetModule,
     MatButtonModule,
     MatButtonToggleModule,
     MatCardModule,
@@ -72,6 +77,7 @@ import {
     MatProgressBarModule,
     MatProgressSpinnerModule,
     MatRadioModule,
+    MatRippleModule,
     MatSelectModule,
     MatSidenavModule,
     MatSlideToggleModule,