Updates Action Bar theme, adds XXHDPI resources

From http://jgilfelt.github.io/android-actionbarstylegenerator/#name=appcompat&compat=appcompat&theme=light&actionbarstyle=solid&texture=0&hairline=0&neutralPressed=0&backColor=eee%2C100&secondaryColor=D6D6D6%2C100&tabColor=84bf70%2C100&tertiaryColor=F2F2F2%2C100&accentColor=84bf70%2C100&cabBackColor=FFFFFF%2C100&cabHighlightColor=84bf70%2C100