Add total size reporting for run_on_app.py

Change-Id: I8b5234bfa73fffc051797638a5eb9dcd85bcb1f3
diff --git a/tools/run_on_app.py b/tools/run_on_app.py
index 440cd97..50dba8d 100755
--- a/tools/run_on_app.py
+++ b/tools/run_on_app.py
@@ -740,7 +740,16 @@
   if options.print_dexsegments:
     dex_files = glob(os.path.join(outdir, '*.dex'))
     utils.print_dexsegments(options.print_dexsegments, dex_files)
+    if not options.golem:
+      print('{}-Total(CodeSize): {}'.format(
+              options.print_dexsegments, compute_size_of_dex_files(dex_files)))
   return 0
 
+def compute_size_of_dex_files(dex_files):
+  dex_size = 0
+  for dex_file in dex_files:
+    dex_size += os.path.getsize(dex_file)
+  return dex_size
+
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))