Only call one unwinder.

Nobody is looking at the mismatches, and it can cause problems
with tombstone parsers.

Also, fix the dump_header_info test and remove unused properties_fake.cpp.

Test: Ran unit tests, verified tombstones still work.
Change-Id: I4261646016b4e84b26a5aee72f3227f1ce48ec9a
6 files changed