- Approver for documents as Admin (#19)

- Approver for documents as Admin
 - UI tests for document approving
 - update config.yml
 - update android test suite
 - idling resources added for toast
 - toast methods refactored
 - tests for approving updated

database.rules.json

@@ -1,10 +1,6 @@
 {
   "rules": {
-    "user": {
-      ".read": true,
-      "$user_id": {
-        ".write": "$user_id === auth.uid"
-      }
-    }
+    ".read": true,
+    ".write": true
   }
 }