Change language score calculation in the calculation of the font family.
Instead of language and script matching, a match in subtag is added.
In addition, a match in subtag has a higher priority than a match in
script. The score levels are divided into 5 score levels and the limit
of the number of font languages is changed to 12 from 17. Multiple
languages selection rule could to be added in the future.
Bug: 31608997
Test: Done by unittests.
Change-Id: I1e7177095f604fd1794bc99ca36c705dcb4c56e7
f20a2ef271