Provide abstraction for ManagerAdaptorInterface

D-Bus implementation of the interface is also included.

Bug: 24194427
TEST=Build apmanager for both Brillo and Chrome OS

Change-Id: Id2478673cbca36279fb9e5e87a203a4eb021d1db
diff --git a/apmanager.gyp b/apmanager.gyp
index a261984..b492133 100644
--- a/apmanager.gyp
+++ b/apmanager.gyp
@@ -78,6 +78,7 @@
         'dbus/config_dbus_adaptor.cc',
         'dbus/dbus_control.cc',
         'dbus/device_dbus_adaptor.cc',
+        'dbus/manager_dbus_adaptor.cc',
         'dbus/permission_broker_dbus_proxy.cc',
         'dbus/service_dbus_adaptor.cc',
         'dbus/shill_dbus_proxy.cc',