touch_updater: Create lock file while updating touch firmware

Powerd will check the lock file and will not suspend the system.

BUG=b:35550315
TEST=manually on device

Change-Id: Ic751526d98d2a132149b37b9d7f6c21765f320de
Reviewed-on: https://chromium-review.googlesource.com/756333
Commit-Ready: Jingkui Wang <jkwang@google.com>
Tested-by: Jingkui Wang <jkwang@google.com>
Reviewed-by: Dan Erat <derat@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
2 files changed
tree: 0dd0e979293e4e3e0aabd14114db07179ea617ca
  1. host_scripts/
  2. policies/
  3. scripts/
  4. LICENSE
  5. OWNERS
  6. README