Extend interface to support getting remote services with the specific transport

Bt stack only gets remote service with TRANSPORT_AUTO mode currently. As
the dual mode device, it may also do sdp service only. Expose the
capability to assign the specific transport.

Ignore-AOSP-First: avoid merge conflict
Bug: 194447999
Test: Take two headphone to test the dual mode behavior
Change-Id: Idce8b0cc3c4f0a35d38dbab06d906dfca99ce93a
Merged-In: Idce8b0cc3c4f0a35d38dbab06d906dfca99ce93a