In Android 10, libcutils is deprecating the hash functions. This
patchset moves to use the STL map to handle storing related
truetype objects.
This patchset moves the truetype functions to it's own static
class and moves the declarations to a header file. I also removed
statistics functions that were not called from anywhere.
Change-Id: I1679df4c7e844c01e3a2cbdaf5117bb09df2a5f3