Specify list_files to be built with embedded launcher

In the current use case of list_files, the module is built with a
possibly incompatible host machine's python version. This change fixes
this by specifying module to be built with embedded launcher.

Test: m list_files
Bug: 277124374
Change-Id: Id894271042136c9db50e63852075a8c4ef36a71e
diff --git a/tools/Android.bp b/tools/Android.bp
index f170336..e325f6b 100644
--- a/tools/Android.bp
+++ b/tools/Android.bp
@@ -92,4 +92,9 @@
     srcs: [
         "list_files.py",
     ],
+    version: {
+      py3: {
+        embedded_launcher: true,
+      }
+    }
 }