Update DroidUPnP to 2.3.0 (15)

metadata/org.droidupnp.txt

@@ -49,6 +49,15 @@ Build:2.2.1,14
         $$MVN3$$ install && \
         popd
 
+Build:2.3.0,15
+    commit=v2.3.0
+    gradle=yes
+    srclibs=Cling@0bc1b6f5f59f97ff9806b72e45153580aa068f93
+    prebuild=sed -i -e '/4thline.org/,+1d' -e '/maven {/d'  build.gradle && \
+        pushd $$Cling$$ && \
+        $$MVN3$$ install && \
+        popd
+
 Maintainer Notes:
 The app itself uses the official 4thline repo to get Cling and dependencies. While
 this is replaced with a srclib, we are still not "good": The srclib itself pulls