hwc: Add vpu client

Stub implementation of VPU in HWC.
This commit passes through binder calls from HWC
to the VPU library. It also has stub prepare/draw calls
in the VPU client object which can be used to configure
VPU in the composition cycle.

Change-Id: I2606f2884e870448d29ef26e02faac92e157e2c6
diff --git a/libhwcomposer/Android.mk b/libhwcomposer/Android.mk
index d47e4b0..12b822a 100644
--- a/libhwcomposer/Android.mk
+++ b/libhwcomposer/Android.mk
@@ -25,4 +25,9 @@
                                  hwc_dump_layers.cpp \
                                  hwc_ad.cpp
 
+ifeq ($(call is-board-platform-in-list, mpq8092), true)
+    LOCAL_SRC_FILES += hwc_vpuclient.cpp
+endif
+
+
 include $(BUILD_SHARED_LIBRARY)