Revert "Using a python script to build sepolicy"

This reverts commit 3506ad3f310d46ace11ecb9f1a0b6d8abc4951c4.
Fix angler/bullhead boot failure.

Bug: 72787689
Test: build
diff --git a/Android.bp b/Android.bp
index 1785342..9952a8f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,4 +1 @@
-subdirs = [
-    "tests",
-    "build",
-]
+subdirs = ["tests"]