Simplify cc library sdk snapshot handling of include dirs/headers

Previously, the code for generating a snapshot of a cc library was
split into two separate phases. The first phase copied the files that
needed copying and the second phase added the properties for the
include dirs. This separation made it difficult to make sure that the
two phases were in sync.

This change merges those two phases together so the same paths used to
copy the files are used in the properties ensuring consistency. As the
various type of include dir and header were treated slightly different
to each other this parameterizes that behavior.

Bug: 142935992
Test: m nothing
Change-Id: I7877464987bbdae9662e5e3f02bb5e5a75dca5a3