Changed AudioControlFactoryTest to unit test

Changed AudioControlFactoryTest to AudioControlFactoryUnitTest, as the
original intention of this test was to unit test AudioControlFactory.

Bug: 155445975
Test: atest AudioControlFactoryUnitTest
Change-Id: Ic74c7b9a65f34f516439e86e03b66eedda3cea6e
diff --git a/service/src/com/android/car/audio/hal/AudioControlWrapperV2.java b/service/src/com/android/car/audio/hal/AudioControlWrapperV2.java
index c623c15..ff504f4 100644
--- a/service/src/com/android/car/audio/hal/AudioControlWrapperV2.java
+++ b/service/src/com/android/car/audio/hal/AudioControlWrapperV2.java
@@ -30,7 +30,10 @@
 import java.util.NoSuchElementException;
 import java.util.Objects;
 
-final class AudioControlWrapperV2 implements AudioControlWrapper {
+/**
+ * Wrapper for IAudioControl@2.0.
+ */
+public final class AudioControlWrapperV2 implements AudioControlWrapper {
     private static final String TAG = AudioControlWrapperV2.class.getSimpleName();
 
     private IAudioControl mAudioControlV2;