qcom/display: Update HALs

- Update the display HAL from Code Aurora Forum
- Add updated overlay library
- Enable HWC with basic video going through overlay
- Cleanup some files

Change-Id: I65c687c51be458cee71213c79e03eeda962d9086
diff --git a/Android.mk b/Android.mk
index 127a6de..73024a0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,11 +1,9 @@
 #Enables the listed display HAL modules
 
-#Libs to be built for all targets (including SDK)
 display-hals := libqcomui
-
 #libs to be built for QCOM targets only
 #ifeq ($(call is-vendor-board-platform,QCOM),true)
-display-hals += libgralloc libgenlock libcopybit
+display-hals += libgralloc libgenlock libcopybit libhwcomposer liboverlay
 #endif
 
 include $(call all-named-subdir-makefiles,$(display-hals))