Correct default payment selection behavior

When there is only one payment app after the selected payment app
uninstalls, select the remaining app as the default payment.
When there are multiple payment apps after the selected payment app
uninstalls, unset the default payment.

Bug: 144443219
Test: Uninstall selected payment app and check the result
Change-Id: Ifd0766ad208e4845ed38e7509e1eff2a4cb38104
1 file changed