Settings: Added a missing FR translation

Google did a bad job.
One french translation about the battery saver is missing into the official Lollipop.

Here's the fix !

Change-Id: Ie26a1993166604414eb4dff55902a80759a3a333
Profiles: update text style to match Settings

-CategoryTitle for headers
-Material.Subhead for titles
-Material.Body1 for summaries
-fix some padding in abstract_trigger_row
-use ic_wifi_signal_4_teal for wifi icons

https://www.dropbox.com/s/mm8aiz44gvpsdlq/Screenshot_2014-12-15-21-54-45.png?dl=0
https://www.dropbox.com/s/z89en7orfup4b55/Screenshot_2014-12-15-21-54-55.png?dl=0

Change-Id: I5e9b77ba056220f0b82a92b2ff46c0f73d0b911b