Android: Removing and re-adding spinner resets last selection

Summary:
An Android Ti.UI.Picker whose property "useSpinner" is set to true will reset its last selection back to the 1st row for all columns when it's removed and re-added to the window.

Steps to reproduce:

1. Create a project using the attached MultiPickerAddRemoveTest.js code.
2. Build and run on Android.
3. Select the last row in all columns in the spinner.
4. Tap the "Remove" button.
5. Tap the "Add" button.
6. Observe the spinner's current selections.

Result:
Spinner resets its selection to the 1st row in all columns when re-added to the window.

Expected Result:
Last selections in each column should be retained.