refactor(material/timepicker): remove explicit change detection

Now that `OnPush` is the default, we can remove it from the metadata.

(cherry picked from commit 8539675)

Author: crisbeto

src/material/timepicker/timepicker-toggle.ts

@@ -8,7 +8,6 @@
 
 import {
   booleanAttribute,
-  ChangeDetectionStrategy,
   Component,
   computed,
   HostAttributeToken,
@@ -36,7 +35,6 @@ import type {MatTimepicker} from './timepicker';
   },
   exportAs: 'matTimepickerToggle',
   encapsulation: ViewEncapsulation.None,
-  changeDetection: ChangeDetectionStrategy.OnPush,
   imports: [MatIconButton],
 })
 export class MatTimepickerToggle<D> {

src/material/timepicker/timepicker.ts

@@ -10,7 +10,6 @@ import {
   afterNextRender,
   AfterRenderRef,
   booleanAttribute,
-  ChangeDetectionStrategy,
   Component,
   computed,
   effect,
@@ -116,7 +115,6 @@ export interface MatTimepickerConnectedInput<D> {
   exportAs: 'matTimepicker',
   templateUrl: 'timepicker.html',
   styleUrl: 'timepicker.css',
-  changeDetection: ChangeDetectionStrategy.OnPush,
   encapsulation: ViewEncapsulation.None,
   imports: [MatOption],
   providers: [