android: switch resource_sizes.py to vpython.

Bug: 1007101
Change-Id: I02608689ba9cb1c0aa72a146cf82c732d3949049
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2620678Reviewed-by: Haiyang Pan <hypan@google.com>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842074}

build/android/resource_sizes.py

-#!/usr/bin/env python
+#!/usr/bin/env vpython
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.