Updated Java build (non-Android)

Generated makefile needs to see a .class file so it doesn't need to build every time make is run

java/dds/OpenDDS/DCPS/FakeAndroidNetworkCallback.java

@@ -1,10 +1,11 @@
 /*
- *
- *
  * Distributed under the OpenDDS License.
  * See: http://www.opendds.org/license.html
  */
 
-// Empty file to build on non-android platforms
+// Empty class to build on non-android platforms
 
 package OpenDDS.DCPS;
+
+public class FakeAndroidNetworkCallback {
+}

java/dds/dcps_java.mpc

@@ -92,14 +92,14 @@ project: idl2jni, javah, dcpslib, optional_jni_check, dcps_java_optional, dcps_m
   verbatim(gnuace, top, 1) {
     android_target_api ?= 0
     need_network_callback = $(shell [ $(android_target_api) -ge 24 ] && echo "ok")
-    opendds_android_network_callback = $(if $(need_network_callback),AndroidNetworkCallback.java,FakeAndroidNetworkCallback.java)
+    opendds_android_network_callback = $(if $(need_network_callback),AndroidNetworkCallback,FakeAndroidNetworkCallback)
     android_jar_file = $(if $(need_network_callback),-classpath $(android_sdk)/platforms/android-$(android_target_api)/android.jar)
   }
 
   Java_Files {
     conditional(gnuace) {
       commandflags += $(android_jar_file)
-      OpenDDS/DCPS/$(opendds_android_network_callback)
+      OpenDDS/DCPS/$(opendds_android_network_callback).java
     }
   }