Add missing DefaultRenderersFactoryTest for decoder extensions

Added `DefaultRenderersFactoryTest` for `IAMF`, `AV1`, and `MIDI` decoder extensions.

PiperOrigin-RevId: 691381816
(cherry picked from commit 27de9f0)

Author: rohitjoins

Diff for: libraries/decoder_av1/build.gradle

@@ -59,4 +59,9 @@ dependencies {
     implementation project(modulePrefix + 'lib-exoplayer')
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
     compileOnly 'org.jetbrains.kotlin:kotlin-annotations-jvm:' + kotlinAnnotationsVersion
+    testImplementation project(modulePrefix + 'test-utils')
+    testImplementation 'org.robolectric:robolectric:' + robolectricVersion
+    androidTestImplementation project(modulePrefix + 'test-utils')
+    androidTestImplementation 'androidx.test:runner:' + androidxTestRunnerVersion
+    androidTestImplementation 'androidx.test.ext:junit:' + androidxTestJUnitVersion
 }

Diff for: libraries/decoder_av1/src/test/AndroidManifest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest package="androidx.media3.decoder.av1.test">
+  <uses-sdk/>
+</manifest>

Diff for: libraries/decoder_av1/src/test/java/androidx/media3/decoder/av1/DefaultRenderersFactoryTest.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package androidx.media3.decoder.av1;
+
+import androidx.media3.common.C;
+import androidx.media3.test.utils.DefaultRenderersFactoryAsserts;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit test for {@link DefaultRenderersFactoryTest} with {@link Libgav1VideoRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public final class DefaultRenderersFactoryTest {
+
+  @Test
+  public void createRenderers_instantiatesAv1Renderer() {
+    DefaultRenderersFactoryAsserts.assertExtensionRendererCreated(
+        Libgav1VideoRenderer.class, C.TRACK_TYPE_VIDEO);
+  }
+}

Diff for: libraries/decoder_iamf/src/test/AndroidManifest.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2024 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest package="androidx.media3.decoder.iamf.test">
+  <uses-sdk/>
+</manifest>

Diff for: libraries/decoder_iamf/src/test/java/androidx/media3/decoder/iamf/DefaultRenderersFactoryTest.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package androidx.media3.decoder.iamf;
+
+import androidx.media3.common.C;
+import androidx.media3.test.utils.DefaultRenderersFactoryAsserts;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit test for {@link DefaultRenderersFactoryTest} with {@link LibiamfAudioRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public final class DefaultRenderersFactoryTest {
+
+  @Test
+  public void createRenderers_instantiatesIamfRenderer() {
+    DefaultRenderersFactoryAsserts.assertExtensionRendererCreated(
+        LibiamfAudioRenderer.class, C.TRACK_TYPE_AUDIO);
+  }
+}

Diff for: libraries/decoder_midi/src/test/java/androidx/media3/decoder/midi/DefaultRenderersFactoryTest.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package androidx.media3.decoder.midi;
+
+import androidx.media3.common.C;
+import androidx.media3.test.utils.DefaultRenderersFactoryAsserts;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit test for {@link DefaultRenderersFactoryTest} with {@link MidiRenderer}. */
+@RunWith(AndroidJUnit4.class)
+public final class DefaultRenderersFactoryTest {
+
+  @Test
+  public void createRenderers_instantiatesMidiRenderer() {
+    DefaultRenderersFactoryAsserts.assertExtensionRendererCreated(
+        MidiRenderer.class, C.TRACK_TYPE_AUDIO);
+  }
+}