CSSJanus: don't mangle 5+ consecutive numeric values

Don't mangle 5+ consecutive numeric values in the
'four_notation_quantity' and 'four_notation_color' rules. This
prevents box-shadow rules from being utterly broken in RTL (but still
doesn't flip them properly).

Bug: 45677
Change-Id: I16cb9e171a79c6f299b40fa02908b0c045e3c474
Merge "CSSJanus: don't mangle 5+ consecutive numeric values"