choose complicated approach for encoding URLs, as tycho doesn't allow com.google.gwt references in common bundles

java/com.sap.sse.shared.android/src/com/sap/sse/util/impl/NonGwtUrlHelper.java

@@ -0,0 +1,23 @@
+package com.sap.sse.util.impl;
+
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
+
+import com.sap.sse.common.util.UrlHelper;
+
+public enum NonGwtUrlHelper implements UrlHelper {
+    INSTANCE;
+    
+    public String encodeUrl(String decodedUrlString) {
+        try {
+            URL url = new URL(decodedUrlString);
+            URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(),
+                    url.getQuery(), url.getRef());
+            return uri.toString();
+        } catch (MalformedURLException | URISyntaxException f) {
+            return null;
+        }
+    }
+}