Using epoch time as test begin time.

The old way of using log_begin_time which doesn't include year will
provide incomplete time information.

Modify check_crash_report and get_qxdm_logs using epoch time.

Modify get_file_names to grab file based on modified time in last
seconds by "find directory -mtime" command. It will provide efficeint
way to get files modified after certain time.

Test: run ACTS test
Bug: None
Change-Id: Id22247b8428c53d55e8a95a605857c23f45373ed
3 files changed
tree: ddc87ecab0847a56d14fa975d60a771961ac7419
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. PREUPLOAD.cfg