Add an API in SupervisionManager to create intent for launching the PIN verification activity

The intent is to be consumed by both Package Installer and KM.

Test: atest SupervisionServiceTest
Bug: 393468509
Flag: android.app.supervision.flags.enable_supervision_settings_screen
Change-Id: I2505cf97b71dcc3eadf52634a7dd7b51f9291c33