Fix 3 ErrorProneStyle findings:

* Non-standard parameter comment; prefer `/* paramName= */ arg`
  (see http://go/bugpattern/ParameterComment) (3 times)

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#codehealth

Tested:
    Local presubmit tests passed.
PiperOrigin-RevId: 471198016

library/dash/src/test/java/com/google/android/exoplayer2/source/dash/DefaultDashChunkSourceTest.java

@@ -95,7 +95,7 @@ public void getNextChunk_forLowLatencyManifest_setsCorrectMayNotLoadAtFullNetwor
             /* elapsedRealtimeOffsetMs= */ 0,
             /* maxSegmentsPerLoad= */ 1,
             /* enableEventMessageTrack= */ false,
-            /* closedCaptionFormats */ ImmutableList.of(),
+            /* closedCaptionFormats= */ ImmutableList.of(),
             /* playerTrackEmsgHandler= */ null,
             PlayerId.UNSET);
 
@@ -144,7 +144,7 @@ public void getNextChunk_forVodManifest_doesNotSetMayNotLoadAtFullNetworkSpeedFl
             /* elapsedRealtimeOffsetMs= */ 0,
             /* maxSegmentsPerLoad= */ 1,
             /* enableEventMessageTrack= */ false,
-            /* closedCaptionFormats */ ImmutableList.of(),
+            /* closedCaptionFormats= */ ImmutableList.of(),
             /* playerTrackEmsgHandler= */ null,
             PlayerId.UNSET);
 
@@ -328,7 +328,7 @@ private DashChunkSource createDashChunkSource(int numberOfTracks) throws IOExcep
         /* elapsedRealtimeOffsetMs= */ 0,
         /* maxSegmentsPerLoad= */ 1,
         /* enableEventMessageTrack= */ false,
-        /* closedCaptionFormats */ ImmutableList.of(),
+        /* closedCaptionFormats= */ ImmutableList.of(),
         /* playerTrackEmsgHandler= */ null,
         PlayerId.UNSET);
   }