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

tools/Android.bp

@@ -92,4 +92,9 @@ python_binary_host {
     srcs: [
         "list_files.py",
     ],
+    version: {
+      py3: {
+        embedded_launcher: true,
+      }
+    }
 }