Don't link with libbinder itself just for the headers

By linking with libbinder.so, it ends up being an actual dependency
for anything that links with android.hidl.token@1.0-utils, which
results in it being copied into APEX files when it shouldn't be.
Use libbinder_headers instead.

Test: build
Change-Id: Ied5a108e4ae8f862fae42a81594d6f0e414a4685
1 file changed