style(xtream): add icons for content types

src/app/xtream/content-type-navigation-item.interface.ts

@@ -3,5 +3,5 @@ import { ContentType } from './content-type.enum';
 export interface ContentTypeNavigationItem {
     contentType: ContentType;
     label: string;
-    icon?: string;
+    icon: string;
 }

src/app/xtream/xtream-main-container.component.ts

@@ -147,14 +147,17 @@ export class XtreamMainContainerComponent implements OnInit {
         {
             contentType: ContentType.ITV,
             label: 'Live Streams',
+            icon: 'live_tv',
         },
         {
             contentType: ContentType.VODS,
             label: 'VOD Streams',
+            icon: 'movie',
         },
         {
             contentType: ContentType.SERIES,
             label: 'Series',
+            icon: 'video_library',
         },
     ];