Use gn_helpers to [se]serialize GN lists.

build/android/gyp/dex.py

Index: build/android/gyp/dex.py
diff --git a/build/android/gyp/dex.py b/build/android/gyp/dex.py
index be411bba29500caa126b2806d773d02b57f75897..87e9b06bcd878ef727cb87a4dfbc88d5e5734b47 100755
--- a/build/android/gyp/dex.py
+++ b/build/android/gyp/dex.py
@@ -91,10 +91,10 @@ def _ParseArgs(args):
     logging.warning('--main-dex-list-path is unused if multidex is not enabled')
 
   if options.inputs:
-    options.inputs = build_utils.ParseGypList(options.inputs)
+    options.inputs = build_utils.ParseGnList(options.inputs)
     _CheckFilePathsEndWithJar(parser, options.inputs)
   if options.excluded_paths:
-    options.excluded_paths = build_utils.ParseGypList(options.excluded_paths)
+    options.excluded_paths = build_utils.ParseGnList(options.excluded_paths)
 
   if options.proguard_enabled_input_path:
     _CheckFilePathEndsWithJar(parser, options.proguard_enabled_input_path)