GitLab

Renamed v4l2_video_device.*->v4l2_device.* and generic_v4l2_video_device.*->generic_v4l2_device.* and tegra_v4l2_video_device.*->tegra_v4l2_device.* to be consistent with class names.

BUG=453934

TEST=Built and deployed on peach_pi. AppRTC loopback and VEA test works fine.

Review URL: https://codereview.chromium.org/882123004

Cr-Commit-Position: refs/heads/master@{#318255}