gd: Store the address when using resolving privacy policy

This address may change with updated, but seed the
initial address properly.

Bug: 171568335
Test: CtsVerifier
Test: gd/cert/run --host
Test: atest --host bluetooth_test_gd

Tag: #refactor
Change-Id: I85dab865ec9c7aa083cab3d6594d6eca4df925ac