fix(material-experimental/mdc-form-field): add ngAcceptInputType

Author: andrewseguin

src/material-experimental/mdc-form-field/form-field.ts

@@ -53,7 +53,7 @@ import {MatFormFieldNotchedOutline} from './directives/notched-outline';
 import {MAT_PREFIX, MatPrefix} from './directives/prefix';
 import {MAT_SUFFIX, MatSuffix} from './directives/suffix';
 import {DOCUMENT} from '@angular/common';
-import {coerceBooleanProperty} from '@angular/cdk/coercion';
+import {BooleanInput, coerceBooleanProperty} from '@angular/cdk/coercion';
 
 /** Type for the available floatLabel values. */
 export type FloatLabelType = 'always' | 'auto';
@@ -723,4 +723,6 @@ export class MatFormField implements AfterViewInit, OnDestroy, AfterContentCheck
     // shadow DOM, however browser that support shadow DOM should support `getRootNode` as well.
     return document.documentElement!.contains(element);
   }
+
+  static ngAcceptInputType_hideRequiredMarker: BooleanInput;
 }