Remove MagicNumber checkstyle

There are a lot of "magic numbers" that we really don't want to extract
as a constant.

Until now, many @SuppressWarnings annotations were added, but it makes
no sense to check for magic number if we silent the warnings everywhere.

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

@@ -84,7 +84,6 @@ public final class DesktopConnection implements Closeable {
         controlSocket.close();
     }
 
-    @SuppressWarnings("checkstyle:MagicNumber")
     private void send(String deviceName, int width, int height) throws IOException {
         byte[] buffer = new byte[DEVICE_NAME_FIELD_LENGTH + 4];