display: Add support for MDP Composition

This change
   1) implements MDP Composition upto 3 layers
   2) adds invalidator support to fall back to FB
      composition during idle screen condition.

Change-Id: I55f27321fd0df096b353d66aaad1cc720cd4b84b
Acked-by: Jeykumar Sankaran <jsanka@codeaurora.org>
diff --git a/libhwcomposer/Android.mk b/libhwcomposer/Android.mk
index 9808aa5..05d033e 100644
--- a/libhwcomposer/Android.mk
+++ b/libhwcomposer/Android.mk
@@ -11,5 +11,6 @@
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps)
 LOCAL_SRC_FILES               :=  hwc.cpp hwc_video.cpp hwc_utils.cpp \
                                   hwc_uimirror.cpp hwc_external.cpp \
-                                  hwc_uevents.cpp hwc_copybit.cpp
+                                  hwc_uevents.cpp hwc_copybit.cpp \
+                                  hwc_mdpcomp.cpp
 include $(BUILD_SHARED_LIBRARY)