Rename TransformerTest to TransformerEndToEndTest.

TransformerTest sounds like a unit test for Transformer but these
tests test behaviour that involves multiple stages of the pipeline.

PiperOrigin-RevId: 425378369

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerTest.java → libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerEndToEndTest.java

@@ -32,7 +32,7 @@
  * robolectric.
  */
 @RunWith(AndroidJUnit4.class)
-public class TransformerTest {
+public class TransformerEndToEndTest {
 
   private static final String VP9_VIDEO_URI_STRING = "asset:///media/vp9/bear-vp9.webm";
   private static final String AVC_VIDEO_URI_STRING = "asset:///media/mp4/sample.mp4";

libraries/transformer/src/test/java/androidx/media3/transformer/TransformerTest.java → libraries/transformer/src/test/java/androidx/media3/transformer/TransformerEndToEndTest.java

@@ -63,9 +63,9 @@
 import org.junit.runner.RunWith;
 import org.robolectric.shadows.ShadowMediaCodec;
 
-/** Unit test for {@link Transformer}. */
+/** End-to-end test for {@link Transformer}. */
 @RunWith(AndroidJUnit4.class)
-public final class TransformerTest {
+public final class TransformerEndToEndTest {
   // TODO(b/214973843): Disable fallback for all tests that aren't specifically testing fallback.
 
   private static final String URI_PREFIX = "asset:///media/";