chrome://voicesearch: Change some labels to clarify their meaning.

Also added a new field, "Hotword Module Installable", which shows
whether Chrome can install the hotword module at all. This will be false
if hotwording is disabled at compile time, or if the user's language is
not supported.

BUG=503496

Review URL: https://codereview.chromium.org/1196243003

Cr-Commit-Position: refs/heads/master@{#335871}
1 file changed