[admob][android] Add dummy methods to AdRequest

lib/modules/admob/AdRequest.js

@@ -3,6 +3,9 @@ export default class AdRequest {
   constructor() {
     this._props = {
       keywords: [],
+      contentUrl: null,
+      isDesignedForFamilies: null,
+      tagForChildDirectedTreatment: null,
     };
   }
 
@@ -15,8 +18,38 @@ export default class AdRequest {
     return this;
   }
 
-  addKeyword(word: string) {
+  addKeyword(keyword: string) {
-    this._props.keywords.push(word);
+    this._props.keywords.push(keyword);
+    return this;
+  }
+
+  setBirthday() {
+    // TODO
+  }
+
+  setContentUrl(url: string) {
+    this._props.contentUrl = url;
+  }
+
+  setGender() {
+    // TODO
+  }
+
+  setLocation() {
+    // TODO
+  }
+
+  setRequestAgent() {
+    // TODO
+  }
+
+  setIsDesignedForFamilies(isDesignedForFamilies: boolean) {
+    this._props.isDesignedForFamilies = isDesignedForFamilies;
+    return this;
+  }
+
+  tagForChildDirectedTreatment(tagForChildDirectedTreatment: boolean) {
+    this._props.tagForChildDirectedTreatment = tagForChildDirectedTreatment;
     return this;
   }
 }