shill_manager: use ShillDBusProxy for Android

Switch to use ShillDBusProxy now that libshill-client is ready.

Bug: None
TEST=Start AP service with shill running

Change-Id: I53eb12c80badb8855684caa25cdd1a3bd9f2f493
diff --git a/Android.mk b/Android.mk
index 49598a6..0f212aa 100644
--- a/Android.mk
+++ b/Android.mk
@@ -30,6 +30,7 @@
       libdbus \
       libfirewalld-client \
       libminijail \
+      libshill-client \
       libshill-net
   LOCAL_C_INCLUDES += \
       $(LOCAL_PATH)/.. \
@@ -81,7 +82,7 @@
     process_factory.cc \
     service.cc \
     shill_manager.cc \
-    shill_stub_proxy.cc
+    shill_dbus_proxy.cc
 $(eval $(apmanager_common))
 include $(BUILD_STATIC_TEST_LIBRARY)