Fix expected message length for touch events

The expected length for a touch event control message was incorrect. As
a consequence, a BufferUnderflowException could occur.

Fixes #1245 <https://github.com/Genymobile/scrcpy/issues/1245>

server/src/main/java/com/genymobile/scrcpy/ControlMessageReader.java

@@ -9,7 +9,7 @@ import java.nio.charset.StandardCharsets;
 public class ControlMessageReader {
 
     private static final int INJECT_KEYCODE_PAYLOAD_LENGTH = 9;
-    private static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 21;
+    private static final int INJECT_TOUCH_EVENT_PAYLOAD_LENGTH = 27;
     private static final int INJECT_SCROLL_EVENT_PAYLOAD_LENGTH = 20;
     private static final int SET_SCREEN_POWER_MODE_PAYLOAD_LENGTH = 1;