Use the original tombstone file's timestamp in recordFileTimestamp

Use the recorded timestamp of the tombstone file to account for both the filtered tombstone's proto and text format

Bug: 323857385
Flag: com.android.server.os.proto_tombstone
Test: m && manual workflow verification
Change-Id: I3eb571d5a743e2f981c9eb538ab6cf31107b3ef6
1 file changed