fixup! refactor(material/core): generalize lazy ripple logic

Author: wagnermaciel

tools/public_api_guard/material/button.md

@@ -19,7 +19,6 @@ import { InjectionToken } from '@angular/core';
 import { MatRipple } from '@angular/material/core';
 import { MatRippleLoader } from '@angular/material/core';
 import { NgZone } from '@angular/core';
-import { OnChanges } from '@angular/core';
 import { OnDestroy } from '@angular/core';
 import { OnInit } from '@angular/core';
 import { Platform } from '@angular/cdk/platform';