Update manual verifier for socketpair() design.

The previous app used to verify permission transfers was pretty
verbose, and the new socketpair() design lends itself to wiring up
BluetoothSocket streams directly, making it much simpler.

Bug: 237030169
Test: manual
Change-Id: Iad40f5e1076e76059d441a3ed321f64dbb912df0
7 files changed