Suppress rawtypes warning when instantiating generic array

Change FakeAdaptiveMediaPeriod back to this style for consistency.

PiperOrigin-RevId: 284967667

library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaPeriod.java

@@ -818,7 +818,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
         /* initializationData= */ null);
   }
 
-  @SuppressWarnings("unchecked")
+  // We won't assign the array to a variable that erases the generic type, and then write into it.
+  @SuppressWarnings({"unchecked", "rawtypes"})
   private static ChunkSampleStream<DashChunkSource>[] newSampleStreamArray(int length) {
     return new ChunkSampleStream[length];
   }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/SsMediaPeriod.java

@@ -277,7 +277,8 @@ import org.checkerframework.checker.nullness.compatqual.NullableType;
     return new TrackGroupArray(trackGroups);
   }
 
-  @SuppressWarnings("unchecked")
+  // We won't assign the array to a variable that erases the generic type, and then write into it.
+  @SuppressWarnings({"unchecked", "rawtypes"})
   private static ChunkSampleStream<SsChunkSource>[] newSampleStreamArray(int length) {
     return new ChunkSampleStream[length];
   }

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeAdaptiveMediaPeriod.java

@@ -45,7 +45,7 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
   private final long durationUs;
 
   private Callback callback;
-  private List<ChunkSampleStream<FakeChunkSource>> sampleStreams;
+  private ChunkSampleStream<FakeChunkSource>[] sampleStreams;
   private SequenceableLoader sequenceableLoader;
 
   public FakeAdaptiveMediaPeriod(
@@ -60,7 +60,7 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
     this.chunkSourceFactory = chunkSourceFactory;
     this.transferListener = transferListener;
     this.durationUs = durationUs;
-    this.sampleStreams = new ArrayList<>();
+    this.sampleStreams = newSampleStreamArray(0);
     this.sequenceableLoader = new CompositeSequenceableLoader(new SequenceableLoader[0]);
   }
 
@@ -94,9 +94,8 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
         validStreams.add((ChunkSampleStream<FakeChunkSource>) stream);
       }
     }
-    this.sampleStreams = validStreams;
-    this.sequenceableLoader =
-        new CompositeSequenceableLoader(sampleStreams.toArray(new SequenceableLoader[0]));
+    this.sampleStreams = validStreams.toArray(newSampleStreamArray(validStreams.size()));
+    this.sequenceableLoader = new CompositeSequenceableLoader(sampleStreams);
     return returnPositionUs;
   }
 
@@ -166,4 +165,10 @@ public class FakeAdaptiveMediaPeriod extends FakeMediaPeriod
   public void onContinueLoadingRequested(ChunkSampleStream<FakeChunkSource> source) {
     callback.onContinueLoadingRequested(this);
   }
+
+  // We won't assign the array to a variable that erases the generic type, and then write into it.
+  @SuppressWarnings({"unchecked", "rawtypes"})
+  private static ChunkSampleStream<FakeChunkSource>[] newSampleStreamArray(int length) {
+    return new ChunkSampleStream[length];
+  }
 }