Merge "Fix problem of RepackApexPayload when using option --signing_args" into main

tools/releasetools/apex_utils.py

@@ -200,7 +200,7 @@ class ApexApkSigner(object):
     # --signing_args "--signing_helper_with_files=%path" to apexer
     if signing_args:
       generate_image_cmd.extend(
-          ['--signing_args', '"{}"'.format(signing_args)])
+          ['--signing_args', signing_args])
 
     # optional arguments for apex repacking
     manifest_json = os.path.join(apex_dir, 'apex_manifest.json')