Vector: Simplify text paths in tiny icons

document-icon.svg and news-icon.svg contained some text converted to
paths. As fonts are generally high-quality, the file size for both
icons was ridiculous (over 10 KB each). Used Inkscape's path simplify
function to smooth out the shapes – this isn't noticeable at the
sizes these icons are displayed at.

Bug: 59744
Change-Id: Ie0537a545c128665d9670bad92e22e9bf01cd59d
Merge "Vector: Simplify text paths in tiny icons"