Use mAddressMap in cdm getAssociationsByAddress

This CL leverages the mAddressMap which was specifically introduces
for the kind of address-based lookup that is needed in the
getAssociationsByAddress method.

Test: atest CtsCompanionDeviceManagerCoreTestCases
Test: atest CtsCompanionDeviceManagerUiAutomationTestCases
Change-Id: Ifb00e184bd491e2385214b7c89d64da33dc36ee3