Add HLS stream and remove non-working content from Cast demo app

PiperOrigin-RevId: 230496581

demos/cast/src/main/java/com/google/android/exoplayer2/castdemo/DemoUtil.java

@@ -88,6 +88,7 @@ import java.util.UUID;
     // App samples.
     ArrayList<Sample> samples = new ArrayList<>();
 
+    // Clear content.
     samples.add(
         new Sample(
             "https://storage.googleapis.com/wvmedia/clear/h264/tears/tears.mpd",
@@ -95,18 +96,6 @@ import java.util.UUID;
             MIME_TYPE_DASH));
     samples.add(
         new Sample(
-            "https://commondatastorage.googleapis.com/gtv-videos-bucket/CastVideos/"
-                + "hls/TearsOfSteel.m3u8",
-            "Clear HLS: Tears of Steel",
-            MIME_TYPE_HLS));
-    samples.add(
-        new Sample(
-            "https://devstreaming-cdn.apple.com/videos/streaming/examples/bipbop_4x3"
-                + "/bipbop_4x3_variant.m3u8",
-            "Clear HLS: Basic 4x3",
-            MIME_TYPE_HLS));
-    samples.add(
-        new Sample(
             "https://html5demos.com/assets/dizzy.mp4", "Clear MP4: Dizzy", MIME_TYPE_VIDEO_MP4));
     SAMPLES = Collections.unmodifiableList(samples);
   }