Removing using the test asset that has Mp3 audio track.

The stream with the mp3 track is added because

- We only encode to AAC
- We only encode when the source track is not AAC

Now that we have a way to force encoding, we no longer need the mp3 track.

The test asset is kept for later parameterized testing.

PiperOrigin-RevId: 440876080

libraries/transformer/src/androidTest/java/androidx/media3/transformer/mh/RepeatedTranscodeTransformationTest.java

@@ -19,7 +19,6 @@ import static androidx.media3.common.util.Assertions.checkNotNull;
 import static com.google.common.truth.Truth.assertWithMessage;
 
 import android.content.Context;
-import androidx.media3.common.MimeTypes;
 import androidx.media3.transformer.AndroidTestUtil;
 import androidx.media3.transformer.TransformationRequest;
 import androidx.media3.transformer.TransformationTestResult;
@@ -46,11 +45,8 @@ public final class RepeatedTranscodeTransformationTest {
                 context,
                 new Transformer.Builder(context)
                     .setTransformationRequest(
-                        new TransformationRequest.Builder()
-                            .setRotationDegrees(45)
-                            // Video MIME type is H264.
-                            .setAudioMimeType(MimeTypes.AUDIO_AAC)
-                            .build())
+                        new TransformationRequest.Builder().setRotationDegrees(45).build())
+                    .setEncoderFactory(AndroidTestUtil.FORCE_ENCODE_ENCODER_FACTORY)
                     .build())
             .build();
 
@@ -60,7 +56,7 @@ public final class RepeatedTranscodeTransformationTest {
       TransformationTestResult testResult =
           transformerRunner.run(
               /* testId= */ "repeatedTranscode_givesConsistentLengthOutput_" + i,
-              AndroidTestUtil.MP4_REMOTE_H264_MP3_URI_STRING);
+              AndroidTestUtil.MP4_REMOTE_10_SECONDS_URI_STRING);
       differentOutputSizesBytes.add(checkNotNull(testResult.transformationResult.fileSizeBytes));
     }
 
@@ -79,10 +75,8 @@ public final class RepeatedTranscodeTransformationTest {
                 new Transformer.Builder(context)
                     .setRemoveAudio(true)
                     .setTransformationRequest(
-                        new TransformationRequest.Builder()
-                            // Video MIME type is H264.
-                            .setRotationDegrees(45)
-                            .build())
+                        new TransformationRequest.Builder().setRotationDegrees(45).build())
+                    .setEncoderFactory(AndroidTestUtil.FORCE_ENCODE_ENCODER_FACTORY)
                     .build())
             .build();
 
@@ -92,7 +86,7 @@ public final class RepeatedTranscodeTransformationTest {
       TransformationTestResult testResult =
           transformerRunner.run(
               /* testId= */ "repeatedTranscodeNoAudio_givesConsistentLengthOutput_" + i,
-              AndroidTestUtil.MP4_REMOTE_H264_MP3_URI_STRING);
+              AndroidTestUtil.MP4_REMOTE_10_SECONDS_URI_STRING);
       differentOutputSizesBytes.add(checkNotNull(testResult.transformationResult.fileSizeBytes));
     }
 
@@ -110,10 +104,8 @@ public final class RepeatedTranscodeTransformationTest {
                 context,
                 new Transformer.Builder(context)
                     .setRemoveVideo(true)
-                    .setTransformationRequest(
-                        new TransformationRequest.Builder()
-                            .setAudioMimeType(MimeTypes.AUDIO_AAC)
-                            .build())
+                    .setTransformationRequest(new TransformationRequest.Builder().build())
+                    .setEncoderFactory(AndroidTestUtil.FORCE_ENCODE_ENCODER_FACTORY)
                     .build())
             .build();
 
@@ -123,7 +115,7 @@ public final class RepeatedTranscodeTransformationTest {
       TransformationTestResult testResult =
           transformerRunner.run(
               /* testId= */ "repeatedTranscodeNoVideo_givesConsistentLengthOutput_" + i,
-              AndroidTestUtil.MP4_REMOTE_H264_MP3_URI_STRING);
+              AndroidTestUtil.MP4_REMOTE_10_SECONDS_URI_STRING);
       differentOutputSizesBytes.add(checkNotNull(testResult.transformationResult.fileSizeBytes));
     }