graphics: add a default impl for IMapper 2.1

This is for reference only.  It almost only has stub implementations
for the new 2.1 methods.

Test: boots and VTS
Change-Id: I60499f3094df1975ccbbcda7b5c03d4a0dc57c39
diff --git a/graphics/mapper/2.1/default/OWNERS b/graphics/mapper/2.1/default/OWNERS
new file mode 100644
index 0000000..3aa5fa1
--- /dev/null
+++ b/graphics/mapper/2.1/default/OWNERS
@@ -0,0 +1,4 @@
+# Graphics team
+jessehall@google.com
+olv@google.com
+stoza@google.com