Remove `=` from parameter args in call to `Constructor.newInstance`

These comments reflect the parameter names of the constructor that
we're reflectively calling, but errorprone complains that they don't
match the parameter names of `Constructor.newInstance`.

PiperOrigin-RevId: 540348118
(cherry picked from commit 2b53f100f858e36159ab636e82bcb07d26868150)

library/core/src/test/java/com/google/android/exoplayer2/mediacodec/AsynchronousMediaCodecCallbackTest.java

@@ -541,7 +541,7 @@ public class AsynchronousMediaCodecCallbackTest {
             Integer.TYPE, Integer.TYPE, String.class);
     constructor.setAccessible(true);
     return constructor.newInstance(
-        /* errorCode= */ 0, /* actionCode= */ 0, /* detailMessage= */ "error from codec");
+        /* errorCode */ 0, /* actionCode */ 0, /* detailMessage */ "error from codec");
   }
 
   private static MediaFormat createMediaFormat(String name) {