Move hidl shims to the vendor partition. (2/2)

We need google shims on the vendor partition because they are providing
an implementation of a vendor defined interface. They were written by
google just as a courtesy/to make the transition easier. They're
basically a set for vendors to assemble their hal implementations
from.

Bug: 34135607
Test: marlin persist.hal.binderization on/off
Change-Id: I2e2af5af39264cf290259755bb9b2eb9827a21f5
diff --git a/graphics/mapper/2.0/default/Android.bp b/graphics/mapper/2.0/default/Android.bp
index c3d2281..ca15961 100644
--- a/graphics/mapper/2.0/default/Android.bp
+++ b/graphics/mapper/2.0/default/Android.bp
@@ -15,6 +15,7 @@
 
 cc_library_shared {
     name: "android.hardware.graphics.mapper@2.0-impl",
+    proprietary: true,
     relative_install_path: "hw",
     srcs: ["GrallocMapper.cpp"],
     cppflags: ["-Wall", "-Wextra"],