gralloc: Move to new directory

In preparation for the hidlization of gralloc.
Also delete obsolete libgralloc

Change-Id: Id657f985cff1bdbf86c781efc52e8bda4e3d27b4
diff --git a/Android.mk b/Android.mk
index a4d5687..a9b1175 100644
--- a/Android.mk
+++ b/Android.mk
@@ -7,7 +7,7 @@
                     $(sdm-libs)/hwc2 gpu_tonemapper libdrmutils libdisplayconfig
 endif
 
-display-hals += libgralloc1
+display-hals += gralloc
 
 ifeq ($(call is-vendor-board-platform,QCOM),true)
     include $(call all-named-subdir-makefiles,$(display-hals))