renamed folders with lower cases and renamed user preferences to local settings

utils/utils_android.ts

@@ -0,0 +1,24 @@
+export class Collections {
+    public static stringArrayToStringSet(str: string[]): any {
+        var hashSet = new java.util.HashSet();
+        if ("undefined" != typeof str) {
+            for (var element in str) {
+                hashSet.add('' + str[element]);
+            }
+        }
+        return hashSet;
+    }
+
+    public static stringSetToStringArray(stringSet: any): string[] {
+        var arr = [];
+        if ("undefined" != typeof stringSet) {
+            var it = stringSet.iterator();
+            while (it.hasNext()) {
+                var element = '' + it.next();
+                arr.push(element);
+            }
+        }
+
+        return arr;
+    }
+}