fix(cdk-experimental/table-scroll-container): avoid CSP errors

Adds a nonce to the `style` tag generated by the table scroll container to avoid CSP errors.

Author: crisbeto

src/cdk-experimental/table-scroll-container/table-scroll-container.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {Directive, ElementRef, Inject, OnDestroy, OnInit, Optional} from '@angular/core';
+import {CSP_NONCE, Directive, ElementRef, Inject, OnDestroy, OnInit, Optional} from '@angular/core';
 import {DOCUMENT} from '@angular/common';
 import {Directionality} from '@angular/cdk/bidi';
 import {_getShadowRoot} from '@angular/cdk/platform';
@@ -52,6 +52,7 @@ export class CdkTableScrollContainer implements StickyPositioningListener, OnDes
     private readonly _elementRef: ElementRef<HTMLElement>,
     @Inject(DOCUMENT) private readonly _document: Document,
     @Optional() private readonly _directionality?: Directionality,
+    @Optional() @Inject(CSP_NONCE) private readonly _nonce?: string | null,
   ) {
     this._uniqueClassName = `cdk-table-scroll-container-${++nextId}`;
     _elementRef.nativeElement.classList.add(this._uniqueClassName);
@@ -114,6 +115,11 @@ export class CdkTableScrollContainer implements StickyPositioningListener, OnDes
   private _getStyleSheet(): CSSStyleSheet {
     if (!this._styleElement) {
       this._styleElement = this._document.createElement('style');
+
+      if (this._nonce) {
+        this._styleElement.nonce = this._nonce;
+      }
+
       this._styleRoot.appendChild(this._styleElement);
     }