Enable java backend for occupant awareness iface.

This change also enables VNDK libbraries to use occupant awareness NDK.

Test: Build test.
Change-Id: Ib85ca91252b9b96b53d886ad85f723b1d1f6178e
diff --git a/automotive/occupant_awareness/aidl/Android.bp b/automotive/occupant_awareness/aidl/Android.bp
index 6e9e8aa..face235 100644
--- a/automotive/occupant_awareness/aidl/Android.bp
+++ b/automotive/occupant_awareness/aidl/Android.bp
@@ -7,7 +7,12 @@
     stability: "vintf",
     backend: {
         java: {
-            enabled: false,
+            platform_apis: true,
         },
-    }
+        ndk: {
+            vndk: {
+                enabled: true,
+            },
+        },
+    },
 }