Bluetooth: Support  HFP Client role on Bluedroid.

Implementation changes to support HFP Client role
on Bluedroid stack.

Change-Id: Ie37e95d3b0e3f785af818fb495c835e420792f4d
server: add enhanced routing support

Add support for policy and metric based routing APIs to
NetworkManagementService. This functionality is used for WQE, IMS, and
Android QoS features.

Change-Id: I5e50185c9ac1cf72c9366815c2ecf590842edfca