[ADI][48/N] remove dialog from Pia V1

There is no verification dialogs designed for V1 and the feature isn't
backward compatible with devices of older releases. There's no need to
maintain the developer verification dialog in Pia V1.

BUG: 360129657
FLAG: android.content.pm.verification_service
Test: builds

Change-Id: I40dda3eb0e66f3639ea44603d32dd5f9d8967f21