[ATFT] Add auto processing for key files.

If you specify KEY_DIR in config file, the tool would periodically
check for unprocessed key bundles in that folder and store that
to the connected ATFA device.

Change-Id: I00a5c4a4e4616ee2af561fd3adaa6a17a821a45a
Test: Unit tests
Bug: 117161528
2 files changed
tree: 151f0d0526a3d08f657610bebaf5fc18753433fc
  1. at-factory-tool/
  2. atap/
  3. epid/
  4. partner-tools/
  5. MODULE_LICENSE_APACHE2
  6. NOTICE