Android - Implement support for space separated scopes

Implement rawScopes configuration option - Handle auth servers that
expect space separated list of scopes.

Without the option enabled spaces are removed from scope string.

Author: mribbons

android/src/main/java/io/fullstack/oauth/OAuthManagerProviders.java

@@ -268,11 +268,19 @@ private static ServiceBuilder _oauth2ServiceBuilder(
       builder.scope(scopeStr);
     }
 
+    boolean rawScopes = (cfg.containsKey("rawScopes") && ((String)cfg.get("rawScopes")).equalsIgnoreCase("true"));
+
     if (opts != null && opts.hasKey("scopes")) {
       scopes = (String) opts.getString("scopes");
-      String scopeStr = OAuthManagerProviders.getScopeString(scopes, ",");
+      String scopeStr = null;
+      
+      if (!rawScopes)
+        scopeStr = OAuthManagerProviders.getScopeString(scopes, ",");
+      else
+        scopeStr = scopes;
+        
       builder.scope(scopeStr);
-    }
+    } 
 
     if (callbackUrl != null) {
       builder.callback(callbackUrl);