Split vendor license notices into vendor partition

Xml files will be generated instead of html files, and then Settings
will generate html file on runtime from xml files of partitions.

Test: build succeeded and tested on sailfish
Bug: 37099941
Merged-In: Id7899381a537b1947cbb6164ed2b4a98492334af
Change-Id: Id7899381a537b1947cbb6164ed2b4a98492334af
(cherry picked from commit 3b7560bf)