frameworks: base: grammar fixes

props to  Boštjan Mejak for letting JIRA know.

JIRA issue: CYAN-4913

Change-Id: I09b742b1935b7ae5a2588ddc2c8c529e4bac0664

Conflicts:

	core/res/res/values/cm_strings.xml
Add column for tracking when a theme was installed

Change-Id: Ie8d13aaaf968c21d765062ae598fdac62caa7b2d