[TIMOB-28353] Android: Update Date/Time picker dialogs to use material theme

*Summary:* We should replace our usage of the native Java [DatePickerDialog](https://developer.android.com/reference/android/app/DatePickerDialog) and [TimePickerDialog](https://developer.android.com/reference/android/app/TimePickerDialog) with the material [MaterialDatePicker](https://developer.android.com/reference/com/google/android/material/datepicker/MaterialDatePicker) and [MaterialTimePicker](https://developer.android.com/reference/com/google/android/material/timepicker/MaterialTimePicker) respectively. https://material.io/components/date-pickers https://material.io/components/time-pickers This effects the following Titanium APIs: * [Ti.UI.Picker.showDatePickerDialog()](https://docs.appcelerator.com/platform/latest/#!/api/Titanium.UI.Picker-method-showDatePickerDialog) * [Ti.UI.Picker.showTimePickerDialog()](https://docs.appcelerator.com/platform/latest/#!/api/Titanium.UI.Picker-method-showTimePickerDialog) *Date Dialog Test:* The date dialog can be tested with the [^DateDialogTest.js], which will display what's shown below. !DateDialog-Android-Light.png|thumbnail! !DateDialog-Android-Dark.png|thumbnail! *Time Dialog Test:* The time dialog can be tested with the [^TimeDialogTest.js], which will display what's shown below. !TimeDialog-Android-Light.png|thumbnail! !TimeDialog-Android-Dark.png|thumbnail! *Breaking-Change:* The app must use a "Theme.MaterialComponents" based theme or else an exception will occur. So, app's using a custom theme based from "Theme.AppCompat" or similar will crash. This is normal and the exception will state that the theme will need to change.