LatinIME: Add keyHintLabels to all keys in qwerty

This adds a second function to every key. I used the
same second function layout as the keyboard from cm.
We could change this easily if a different layout or
set of keys is desirable.

Change-Id: Ie290c138371b2f9fa082ba7d94a76b30a61428e7
Merge "LatinIME: Add keyHintLabels to all keys in qwerty" into android-4.4
merge changes from Omni 4.4 into local branch

Conflicts:
	java/res/xml/rowkeys_qwerty3.xml

Change-Id: I194bb5de152ddc010f44c9c9a414010c2eb0d73b