The ratio between densities is not constant.
The Exception for dpi qualifier in point 4 of the algorithm should be detailed.
I understand that if my config is ldpi-trackball-v5
and I have the choice between mdpi and hdpi-trackball-v5, mdpi will be chosen.
Cherry-picked from master CL 59188.
Change-Id: Ibe412a82845527ebdb104605c99c205ca52ab97c
c09a6977ae