Heapprofd needs to read binary files and library in order to support
unwinding the stack. sytem_file does not include all thes files, e.g.
zygote_exec is only labeled as system_file_type.

Denials:

12-03 10:50:37.485  9263  9263 I heapprofd: type=1400 audit(0.0:177): avc: denied { read } for name="app_process64" dev="dm-0" ino=2286 scontext=u:r:heapprofd:s0 tcontext=u:object_r:zygote_exec:s0 tclass=file permissive=1
12-03 10:50:37.485  9263  9263 I heapprofd: type=1400 audit(0.0:178): avc: denied { open } for path="/system/bin/app_process64" dev="dm-0" ino=2286 scontext=u:r:heapprofd:s0 tcontext=u:object_r:zygote_exec:s0 tclass=file permissive=1
12-03 10:50:37.485  9263  9263 I heapprofd: type=1400 audit(0.0:179): avc: denied { getattr } for path="/system/bin/app_process64" dev="dm-0" ino=2286 scontext=u:r:heapprofd:s0 tcontext=u:object_r:zygote_exec:s0 tclass=file permissive=1

Change-Id: Ie04b722a78ff6367729930ee0ef96f48ccf6aa55
Bug: 117762471