mondrianwifi: overlay: Minor updates from stock

Looking through the diffs from stock, I noticed a few minor
improvements I could make.

Change-Id: Ie92d4f9a95e77cf1093f14abce114df79085b596
mondrianwifi: overlay: Tell Trebuchet we are a tablet

Change-Id: If1220fafb7877a7b4def0df8b3c38869be9a4a35
Merge remote-tracking branch 'cm/cm-11.0' into HEAD