[js][all] added nativeSDKMissing check for all modules - part of making all module native sdk's optional.

lib/modules/analytics/index.js

@@ -1,6 +1,6 @@
 // @flow
 import { NativeModules } from 'react-native';
-import { Base } from './../base';
+import { nativeSDKMissing } from './../../utils';
 
 const FirebaseAnalytics = NativeModules.RNFirebaseAnalytics;
 const AlphaNumericUnderscore = /^[a-zA-Z0-9_]+$/;
@@ -21,7 +21,13 @@ const ReservedEventNames = [
   'user_engagement',
 ];
 
-export default class Analytics extends Base {
+export default class Analytics {
+  constructor() {
+    if (FirebaseAnalytics.nativeSDKMissing) {
+      return nativeSDKMissing('analytics');
+    }
+  }
+
   /**
    * Logs an app event.
    * @param  {string} name