Revert "Move more non-AB code to separate files"

This reverts commit 513b86e5c210b2d9f73c1a2bd2272ea4c3f94a58.

Change-Id: I6aae60642772a052404eb1773966b2e637864bbc
diff --git a/tools/releasetools/check_target_files_vintf.py b/tools/releasetools/check_target_files_vintf.py
index e7d3a18..33624f5 100755
--- a/tools/releasetools/check_target_files_vintf.py
+++ b/tools/releasetools/check_target_files_vintf.py
@@ -31,6 +31,7 @@
 import zipfile
 
 import common
+from apex_manifest import ParseApexManifest
 
 logger = logging.getLogger(__name__)