change import

Author: Caleb Kish

src/material/timepicker/timepicker-input.ts

@@ -42,7 +42,7 @@ import {Subscription} from 'rxjs';
 import {DOWN_ARROW, ESCAPE, hasModifierKey, UP_ARROW} from '@angular/cdk/keycodes';
 import {validateAdapter} from './util';
 import {DOCUMENT} from '@angular/common';
-import {_getFocusedElementPierceShadowDom} from '../../cdk/platform';
+import {_getFocusedElementPierceShadowDom} from '@angular/cdk/platform';
 
 /**
  * Input that can be used to enter time and connect to a `mat-timepicker`.