graphics: add a type-only common package

Copied from system/graphics.h with two changes

 - YCbCr -> YCBCR
 - HAL_TRANSFORM_RESERVED is removed

Test: make
Change-Id: I1d343ff176ac61f911fee949861ce4b12255cd47
diff --git a/graphics/Android.bp b/graphics/Android.bp
index 92bcb2a..4ac7766 100644
--- a/graphics/Android.bp
+++ b/graphics/Android.bp
@@ -2,6 +2,7 @@
 subdirs = [
     "allocator/2.0",
     "allocator/2.0/default",
+    "common/1.0",
     "composer/2.1",
     "composer/2.1/default",
     "mapper/2.0",