This patch adds a production build output gzipped file size check to the
test script so that any future changes may only introduce known size
differences. Note:
• The initial limit was taken from the present gzipped file size rounded
up to the 10th of a kibibyte.
• JEDEC notation is used. bundlesize internally uses Bytes utility which
only supports base 2 units.
https://github.com/visionmedia/bytes.js
Bug: T176211
Change-Id: Ie95f388673b0b982b105fef9a2917513a3307060