docs: add types in injection token examples (#20818)

Use strong typing for injection token examples. Closes #20759

(cherry picked from commit d5eb389)

Author: bampakoa

src/material/bottom-sheet/bottom-sheet.md

@@ -45,7 +45,7 @@ import {MAT_BOTTOM_SHEET_DATA} from '@angular/material/bottom-sheet';
   template: 'passed in {{ data.names }}',
 })
 export class HobbitSheet {
-  constructor(@Inject(MAT_BOTTOM_SHEET_DATA) public data: any) { }
+  constructor(@Inject(MAT_BOTTOM_SHEET_DATA) public data: {names: string[]}) { }
 }
 ```
 

src/material/dialog/dialog.md

@@ -102,7 +102,7 @@ import {MAT_DIALOG_DATA} from '@angular/material/dialog';
   template: 'passed in {{ data.name }}',
 })
 export class YourDialog {
-  constructor(@Inject(MAT_DIALOG_DATA) public data: any) { }
+  constructor(@Inject(MAT_DIALOG_DATA) public data: {name: string}) { }
 }
 ```
 

src/material/snack-bar/snack-bar.md

@@ -69,7 +69,7 @@ import {MAT_SNACK_BAR_DATA} from '@angular/material/snack-bar';
   template: 'passed in {{ data }}',
 })
 export class MessageArchivedComponent {
-  constructor(@Inject(MAT_SNACK_BAR_DATA) public data: any) { }
+  constructor(@Inject(MAT_SNACK_BAR_DATA) public data: string) { }
 }
 ```