Added a dist directive to the stub targets.

This is so that they end up the dist output and we can grab them off of
the build server.

Bug: 123756920
Test: m dist
Change-Id: Ie3de8d90146d4d4391fe1ffefca49aa3c573a023
diff --git a/car-lib/Android.bp b/car-lib/Android.bp
index 4e03d8c..2c8858a 100644
--- a/car-lib/Android.bp
+++ b/car-lib/Android.bp
@@ -215,6 +215,9 @@
         },
     },
     compile_dex: true,
+    dist: {
+        targets: ["dist_files"],
+    }
 }
 
 java_library_static {
@@ -231,6 +234,9 @@
         },
     },
     compile_dex: true,
+    dist: {
+        targets: ["dist_files"],
+    }
 }
 
 java_library_static {