Add Spec for DatePickerAndroid (facebook#24916)

Summary:
This PR solves part of this issue: facebook#24875

## Changelog

[General] [Added] - TM Spec for DatePickerAndroid
Pull Request resolved: facebook#24916

Reviewed By: RSNara

Differential Revision: D15425864

Pulled By: fkgozali

fbshipit-source-id: 964412d9d8daedfe265cf277f9fe5896856e47f8

Libraries/Components/DatePickerAndroid/DatePickerAndroid.android.js

@@ -10,9 +10,8 @@
 
 'use strict';
 
-const DatePickerModule = require('../../BatchedBridge/NativeModules')
-  .DatePickerAndroid;
 import type {Options, DatePickerOpenAction} from './DatePickerAndroidTypes';
+import NativeDatePickerAndroid from './NativeDatePickerAndroid';
 
 /**
  * Convert a Date to a timestamp.
@@ -74,7 +73,7 @@ class DatePickerAndroid {
       _toMillis(optionsMs, 'minDate');
       _toMillis(optionsMs, 'maxDate');
     }
-    return DatePickerModule.open(options);
+    return NativeDatePickerAndroid.open(options);
   }
 
   /**

Libraries/Components/DatePickerAndroid/NativeDatePickerAndroid.js

@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import type {TurboModule} from 'RCTExport';
+import * as TurboModuleRegistry from 'TurboModuleRegistry';
+
+export interface Spec extends TurboModule {
+  +open: (options: Object) => Promise<Object>;
+}
+
+export default TurboModuleRegistry.getEnforcing<Spec>('DatePickerAndroid');