Add BT pairing test case for BR/EDR bonding with Auto transport

- Make remote device discoverable over BR/EDR and non discoverable over LE
- Start device discovery from Android
- Initiate pairing from Android with remote device using Auto transport
- Expectation: Pairing succeeds over BR/EDR Transport

Test: atest PairingWithDiscoveryTest
Flag: TEST_ONLY
Bug: 388074343
Change-Id: I412f09304eec321f4364434f653c161d500f8c05