Updating 'svgo' to v2.8.0 and newest Wikimedia SVG guidelines – mainly around new whitespace features of SVGO. Change-Id: Ie48f5e78b3f9b6e7f01b65618c1d6089fa4a2f54
Bug: T291286 Change-Id: Id1e056330606b87bafb8f43e7ff28d96290465b4