Transformer Demo: Add short test video

Add a very short (1 second) video, so that some manual tests / prototyping,
including tests for the start and end of a video, encoder selection, or
changes applied to frames, can finish quickly.

PiperOrigin-RevId: 441756901

demos/transformer/src/main/java/com/google/android/exoplayer2/transformerdemo/ConfigurationActivity.java

@@ -65,6 +65,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
   public static final String PERIODIC_VIGNETTE_OUTER_RADIUS = "periodic_vignette_outer_radius";
   private static final String[] INPUT_URIS = {
     "https://html5demos.com/assets/dizzy.mp4",
+    "https://storage.googleapis.com/exoplayer-test-media-1/mp4/1920w_1080h_4s.mp4",
     "https://storage.googleapis.com/exoplayer-test-media-0/android-block-1080-hevc.mp4",
     "https://storage.googleapis.com/exoplayer-test-media-0/BigBuckBunny_320x180.mp4",
     "https://html5demos.com/assets/dizzy.webm",
@@ -77,6 +78,7 @@ public final class ConfigurationActivity extends AppCompatActivity {
   };
   private static final String[] URI_DESCRIPTIONS = { // same order as INPUT_URIS
     "MP4 with H264 video and AAC audio",
+    "Short MP4 with H265 video and AAC audio",
     "MP4 with H265 video and AAC audio",
     "Long MP4 with H264 video and AAC audio",
     "WebM with VP8 video and Vorbis audio",