Replace iterator with foreach

src/org/fdroid/fdroid/DB.java

@@ -1085,9 +1085,8 @@ public class DB {
         }
 
         public boolean contains(String v) {
-            Iterator<String> it = iterator();
+            for (String s : this) {
-            while (it.hasNext()) {
+                if (s.equals(v))
-                if (it.next().equals(v))
                     return true;
             }
             return false;