fix: APL set-top box wrongly identifies as an Apple device. (#6026)

Author: Viktor Vasylkovskyi

lib/util/platform.js

@@ -234,6 +234,7 @@ shaka.util.Platform = class {
     return !!navigator.vendor && navigator.vendor.includes('Apple') &&
         !shaka.util.Platform.isTizen() &&
         !shaka.util.Platform.isEOS() &&
+        !shaka.util.Platform.isAPL() &&
         !shaka.util.Platform.isVirginMedia() &&
         !shaka.util.Platform.isOrange() &&
         !shaka.util.Platform.isPS4() &&
@@ -357,6 +358,15 @@ shaka.util.Platform = class {
     return shaka.util.Platform.userAgentContains_('PC=EOS');
   }
 
+  /**
+   * Check if the current platform is an APL set-top box.
+   *
+   * @return {boolean}
+   */
+  static isAPL() {
+    return shaka.util.Platform.userAgentContains_('PC=APL');
+  }
+
   /**
    * Guesses if the platform is a mobile one (iOS or Android).
    *