libdebuggerd: extract and print the fdsan table.

This commit only prints the raw value of the owner tag, pretty-printing
will come in a follow-up commit.

Test: debuggerd `pidof adbd`
Test: static_crasher fdsan_file + manual inspection of tombstone
Change-Id: Idb7375a12e410d5b51e6fcb6885d4beb20bccd0e