[Sensor]Enable screen coordinates for Gyroscope and Magnetometer

This patch introduces construction options for the screen coordinates
synchronization in the Gyroscope and Magnetometer classes, accordingly
to [1] and [2]

[1]https://w3c.github.io/gyroscope/#construct-a-gyroscope-object
[2]https://w3c.github.io/magnetometer/#construct-a-magnetometer-object

Bug: 750018
Change-Id: I954dd56d9471d96470a3851b755a95d7182a7388
Reviewed-on: https://chromium-review.googlesource.com/907556
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Alexander Shalamov <alexander.shalamov@intel.com>
Commit-Queue: Mikhail Pozdnyakov <mikhail.pozdnyakov@intel.com>
Cr-Commit-Position: refs/heads/master@{#536083}
14 files changed