IMapper 5 - the Stable C approach

Test: make VtsHalGraphicsMapperStableC_TargetTest VtsHalGraphicsAllocatorAidl_TargetTest

Change-Id: I910b27f388e3fb7261425dd4b2133885c05edd37
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index ff481f9..c13e471 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -268,7 +268,7 @@
     </hal>
     <hal format="aidl" optional="true">
         <name>android.hardware.graphics.allocator</name>
-        <version>1</version>
+        <version>1-2</version>
         <interface>
             <name>IAllocator</name>
             <instance>default</instance>
@@ -282,7 +282,7 @@
             <instance>default</instance>
         </interface>
     </hal>
-    <hal format="hidl" optional="false">
+    <hal format="hidl" optional="true">
         <name>android.hardware.graphics.mapper</name>
         <!-- New, non-Go devices should use 4.0, tested in vts_treble_vintf_vendor_test -->
         <version>2.1</version>