Started using direct ByteBuffers for our performance tests (#83371)

dev/benchmarks/platform_channels_benchmarks/android/app/src/main/kotlin/com/example/platform_channels_benchmarks/MainActivity.kt

@@ -23,7 +23,7 @@ class MainActivity: FlutterActivity() {
         } }
         val basicStandard = BasicMessageChannel(flutterEngine.dartExecutor, "dev.flutter.echo.basic.standard", StandardMessageCodec.INSTANCE)
         basicStandard.setMessageHandler { message, reply -> reply.reply(message) }
-        val basicBinary = BasicMessageChannel(flutterEngine.dartExecutor, "dev.flutter.echo.basic.binary", BinaryCodec.INSTANCE)
+        val basicBinary = BasicMessageChannel(flutterEngine.dartExecutor, "dev.flutter.echo.basic.binary", BinaryCodec.INSTANCE_DIRECT)
         basicBinary.setMessageHandler { message, reply -> run {
             if (byteBufferCache == null) {
                 byteBufferCache = ByteBuffer.allocateDirect(message!!.capacity())