servlet: fix checkstyle formatting for AsyncServletOutputStreamWriter (grpc#12778)

Author: AgraVator

servlet/src/main/java/io/grpc/servlet/AsyncServletOutputStreamWriter.java

@@ -28,14 +28,11 @@
 import java.io.IOException;
 import java.util.Queue;
 import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
-import java.util.concurrent.locks.LockSupport;
 import java.util.function.BiFunction;
 import java.util.function.BooleanSupplier;
 import java.util.logging.Level;
 import java.util.logging.Logger;
-import javax.annotation.Nullable;
 import javax.servlet.AsyncContext;
 import javax.servlet.ServletOutputStream;
 

servlet/src/test/java/io/grpc/servlet/AsyncServletOutputStreamWriterTest.java

@@ -38,16 +38,16 @@ public void onWritePossibleWhenAlreadyReadyAndDrainedReturnsImmediately() throws
     AsyncServletOutputStreamWriter writer =
         new AsyncServletOutputStreamWriter(
             (bytes, len) -> writeAction,
-            () -> {},
-            () -> {},
+            () -> { },
+            () -> { },
             () -> true,
-            new Log() {});
+            new Log() { });
 
     // Initial onWritePossible call turns readyAndDrained to true
     writer.onWritePossible();
 
     long startTime = System.nanoTime();
-    // Subsequent onWritePossible call when readyAndDrained is already true must return non-blockingly
+    // Subsequent call when readyAndDrained is true must return non-blockingly
     writer.onWritePossible();
     long durationMs = (System.nanoTime() - startTime) / 1_000_000;