tree c7700063eff10d07b3e4c0698482e6c8526d9e35
parent facf94c74a2cc44f294c4789d36d5c7281c7bc3f
author Mark Salyzyn <salyzyn@google.com> 1457632208 -0800
committer Mark Salyzyn <salyzyn@google.com> 1458680874 -0700

liblog: add __android_log_pmsg_file_write

(cherry pick from commit d4b061bde280fce9b5426b5738a02d42ec263c48)

- This is considered an Android Private function, not exported
  for general use.
- goal is to record a file's content into a series of log
  messages into pmsg, to be retrieved after a reboot for
  transfer to a persistent location.
- filename reference is converted to a tag-unique
  "<dirbase>:<filebase>".
- buffer and length representing the filename contents are
  recorded, along with a sequence number placed into the nsec
  time field to ANDROID_LOG_PMSG_FILE_MAX_SEQUENCE.
- Add a gTest for this function.

Bug: 27176738
Change-Id: If93df3ae8bfc1bb75516d4a1fd8dae0301af644b