GitLab

As we may retry up to 50 times of the initialization in
AccelerometerFileReader, this commit shows only the first log of empty
directory of /dev/cros-ec-accel and missing Accelerometer trigger.

BUG=none
TEST=run on octopus

Change-Id: Idac9846b1c022ca4658f73b218f68900f4f633d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2569501Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Cheng-Hao Yang <chenghaoyang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#834117}