fix(material-experimental/mdc-button): fix ripple noop animation (#21360)

Author: andrewseguin

src/material-experimental/mdc-button/button-base.ts

@@ -93,7 +93,10 @@ export const _MatButtonBaseMixin: CanDisableRippleCtor&CanDisableCtor&CanColorCt
 export class MatButtonBase extends _MatButtonBaseMixin implements CanDisable, CanColor,
                                                                   CanDisableRipple {
   /** The ripple animation configuration to use for the buttons. */
-  _rippleAnimation: RippleAnimationConfig = RIPPLE_ANIMATION_CONFIG;
+  _rippleAnimation: RippleAnimationConfig =
+      this._animationMode === 'NoopAnimations' ?
+          {enterDuration: 0, exitDuration: 0} :
+          RIPPLE_ANIMATION_CONFIG;
 
   /** Whether the ripple is centered on the button. */
   _isRippleCentered = false;