Porting the client <-> HAL service interface

This change removes the interface layer between the client and the
underlying HAL. This is one part of a two part change to properly finish
migrating all of the RemotelyProvisionedComponent functionality to
system/keymaster.

Test: atest VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: Ibccc6b3af86a63b8a6c6207fffd43cfc41b903b5