[ATS-854] Add media tracks to player from webvtt rendition (#6626)

* ATS-854 Add media tracks to player from webvtt rendition

* ATS-854 Fix condition

* ATS-854 Fix lint

* ATS-854 Move logic to media player

* ATS-854 Fix angular.json

* ATS-854 Fix error

lib/core/viewer/models/viewer.model.ts

@@ -0,0 +1,23 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export interface Track {
+    src: string;
+    label?: string;
+    kind?: string;
+    srclang?: string;
+}