Added smiles without noise to AOSP keyboard

Added some smiles on top of default: :) ;) :( :D :P ^^ -_-
They are very popular!

Change-Id: I5c78992ce3fa8b95052ca2136796bb7a9c4c510f
Make LatinIME persistent
Reduce hint label width to prevent Lato overdraw

The 'WXYZ' hint label in the 9 pad is slightly too wide when Lato
is applied, causing the label to be drawn a little outside the button.

Change-Id: Ie597feecf44d47a1e52529dc0e86880ba34f1bf2