Eliminate unnecessary conversion to byte array.

Fixes #7489

RELNOTES=n/a
PiperOrigin-RevId: 690096339

Author: guoci

android/guava/src/com/google/common/io/LittleEndianDataOutputStream.java

@@ -17,7 +17,6 @@
 import com.google.common.annotations.GwtIncompatible;
 import com.google.common.annotations.J2ktIncompatible;
 import com.google.common.base.Preconditions;
-import com.google.common.primitives.Longs;
 import java.io.DataOutput;
 import java.io.DataOutputStream;
 import java.io.FilterOutputStream;
@@ -143,8 +142,7 @@ public void writeInt(int v) throws IOException {
    */
   @Override
   public void writeLong(long v) throws IOException {
-    byte[] bytes = Longs.toByteArray(Long.reverseBytes(v));
-    write(bytes, 0, bytes.length);
+    ((DataOutputStream) out).writeLong(Long.reverseBytes(v));
   }
 
   /**

guava/src/com/google/common/io/LittleEndianDataOutputStream.java

@@ -17,7 +17,6 @@
 import com.google.common.annotations.GwtIncompatible;
 import com.google.common.annotations.J2ktIncompatible;
 import com.google.common.base.Preconditions;
-import com.google.common.primitives.Longs;
 import java.io.DataOutput;
 import java.io.DataOutputStream;
 import java.io.FilterOutputStream;
@@ -143,8 +142,7 @@ public void writeInt(int v) throws IOException {
    */
   @Override
   public void writeLong(long v) throws IOException {
-    byte[] bytes = Longs.toByteArray(Long.reverseBytes(v));
-    write(bytes, 0, bytes.length);
+    ((DataOutputStream) out).writeLong(Long.reverseBytes(v));
   }
 
   /**