Bug 40800: Add WebTunnel support

service/src/main/java/org/torproject/android/service/TorService.java

@@ -379,8 +379,10 @@ public final class TorService extends Service implements TorServiceConstants, Or
             if(!pluggableTransportSnow.canExecute()) pluggableTransportSnow.setExecutable(true);
             File pluggableTransportConjure = new File(nativeDir, "libConjure.so");
             if(!pluggableTransportConjure.canExecute()) pluggableTransportConjure.setExecutable(true);
+            File pluggableTransportWebtunnel = new File(nativeDir, "libWebtunnel.so");
+            if(!pluggableTransportWebtunnel.canExecute()) pluggableTransportWebtunnel.setExecutable(true);
 
-            builder.configurePluggableTransportsFromSettings(pluggableTransportObfs, pluggableTransportSnow, pluggableTransportConjure);
+            builder.configurePluggableTransportsFromSettings(pluggableTransportObfs, pluggableTransportSnow, pluggableTransportConjure, pluggableTransportWebtunnel);
             mDataService.updateConfigBuilder(builder);
             onionProxyManager.getTorInstaller().updateTorConfigCustom
                     (builder.asString());