Ignore empty pseudo and identity address

Identity or pseudo address may be empty in the record for the device
being removed. Stack must not try to remove or disconnect these empty
addresses.
Also, use identity address instead of target address in pending remove
queue.

Test: mmm packages/modules/Bluetooth
Test: Manual | Pair and remove dual mode devices
Flag: com.android.bluetooth.flags.wait_for_disconnect_before_unbond
Bug: 356585051
Bug: 345299969
Change-Id: I91d6519e4773174043c8137ee36c109527f63fe1