refactor(material/checkbox): use ID generator

Switches to using the ID generator service to create unique IDs.

Author: crisbeto

src/material/checkbox/checkbox.spec.ts

@@ -298,7 +298,7 @@ describe('MatCheckbox', () => {
       fixture.changeDetectorRef.markForCheck();
       fixture.detectChanges();
 
-      expect(checkboxInstance.inputId).toMatch(/mat-mdc-checkbox-\d+/);
+      expect(checkboxInstance.inputId).toMatch(/mat-mdc-checkbox-\w+\d+/);
       expect(inputElement.id).toBe(checkboxInstance.inputId);
     }));
 
@@ -965,8 +965,8 @@ describe('MatCheckbox', () => {
         .queryAll(By.directive(MatCheckbox))
         .map(debugElement => debugElement.nativeElement.querySelector('input').id);
 
-      expect(firstId).toMatch(/mat-mdc-checkbox-\d+-input/);
-      expect(secondId).toMatch(/mat-mdc-checkbox-\d+-input/);
+      expect(firstId).toMatch(/mat-mdc-checkbox-\w+\d+-input/);
+      expect(secondId).toMatch(/mat-mdc-checkbox-\w+\d+-input/);
       expect(firstId).not.toEqual(secondId);
     }));
   });

src/material/checkbox/checkbox.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import {FocusableOption} from '@angular/cdk/a11y';
+import {_IdGenerator, FocusableOption} from '@angular/cdk/a11y';
 import {
   ANIMATION_MODULE_TYPE,
   AfterViewInit,
@@ -77,9 +77,6 @@ export class MatCheckboxChange {
   checked: boolean;
 }
 
-// Increasing integer for generating unique ids for checkbox components.
-let nextUniqueId = 0;
-
 // Default checkbox configuration.
 const defaults = MAT_CHECKBOX_DEFAULT_OPTIONS_FACTORY();
 
@@ -255,7 +252,7 @@ export class MatCheckbox
     this._options = this._options || defaults;
     this.color = this._options.color || defaults.color;
     this.tabIndex = tabIndex == null ? 0 : parseInt(tabIndex) || 0;
-    this.id = this._uniqueId = `mat-mdc-checkbox-${++nextUniqueId}`;
+    this.id = this._uniqueId = inject(_IdGenerator).getId('mat-mdc-checkbox-');
     this.disabledInteractive = this._options?.disabledInteractive ?? false;
   }