Flow strict in DatePickerAndroid.android.js, DatePickerAndroid.ios.js (#22106)

Summary:
Related to #22100

Turn Flow strict mode on for DatePickerAndroid

- [x] npm run prettier
- [ ] npm run flow-check-ios
- [ ] npm run flow-check-android

This error was happend #22101 #22048

[GENERAL] [ENHANCEMENT] [Components/DatePickerAndroid/DatePickerAndroid.android.js] - Flow strict mode
[GENERAL] [ENHANCEMENT] [Components/DatePickerAndroid/DatePickerAndroid.ios.js] - Flow strict mode
Pull Request resolved: https://github.com/facebook/react-native/pull/22106

Reviewed By: TheSavior

Differential Revision: D12919276

Pulled By: RSNara

fbshipit-source-id: 79672b2894435ca3c9988fefee3685700a8d8936

Libraries/Components/DatePickerAndroid/DatePickerAndroid.ios.js

@@ -5,13 +5,20 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @format
- * @flow
+ * @flow strict-local
  */
 
 'use strict';
 
+type Options = $ReadOnly<{|
+  date?: ?(Date | number),
+  minDate?: ?(Date | number),
+  maxDate?: ?(Date | number),
+  mode?: ?('calender' | 'spinner' | 'default'),
+|}>;
+
 const DatePickerAndroid = {
-  async open(options: Object): Promise<Object> {
+  async open(options: Options): Promise<void> {
     return Promise.reject({
       message: 'DatePickerAndroid is not supported on this platform.',
     });