Move python sepolicy tests to embedded launcher

This is a necessary for enforcing these tests in CTS.

Bug: 37008075
Test: build
Change-Id: I36b4ce71c26a0ba01cd0289fe363f0a9f7db1214
(cherry picked from commit 8d614b3f8191ece8a8ce5002949a0fe54e009177)
diff --git a/tests/Android.bp b/tests/Android.bp
index 8fe89e5..8dc3330 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -19,6 +19,7 @@
     name: "py2_only",
     version: {
         py2: {
+            embedded_launcher: true,
             enabled: true,
         },
         py3: {