fix WST v2 won't update bug

Currently, when a web app manifest adds new WST v2 parameters (or
modifies existing ones), Chromium won't trigger an update because it's
not doing diffs on WST v2 parameters.

This CL adds web app manifest diffing for WST v2 parameters.

Bug: 885313
Change-Id: I440e1f9681d2209868e15ec34c1c01e8c99a8a47
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1592359
Reviewed-by: Peter Kotwicz <[email protected]>
Reviewed-by: Yaron Friedman <[email protected]>
Commit-Queue: Henry Jian <[email protected]>
Cr-Commit-Position: refs/heads/master@{#664004}
15 files changed