Re-unite sources with their headers

Move all the includes for androidfw under
a common base path for that library instead
of frameworks/base/includes.

Also fixes -Werror issues that resulted in
no longer being -isystem.

Test: builds
Change-Id: Ic4312eb61b197af114dded5691d5ae1ec82923f7
Merged-In: Ic4312eb61b197af114dded5691d5ae1ec82923f7
(cherry picked from commit f6113af2)