Rename device_orientation to device_sensors

      content/{renderer, common, browser}/device_orientation ->
content/{renderer, common, browser}/device_sensors.

Rename DeviceMotionAndOrientation.java -> DeviceSensors.java

Fix the ifdef include guards
Fix Linting nits complained by cpplint.py

This change is needed to add DeviceLight api.
I will add DeviceLight related changes after https://codereview.chromium.org/143823004/
is added in Blink.

BUG=336424

Review URL: https://codereview.chromium.org/236833003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@265421 0039d316-1c4b-4281-b951-d872f2087c98