[Device Service] Port ScreenOrientationListener into Device Service.

services/device/manifest.json

Index: services/device/manifest.json
diff --git a/services/device/manifest.json b/services/device/manifest.json
index 0ec13e5610549391b8b532b1dc544a6229ad2a74..28b91404d47f581b861cfa018147d9f104ca5fc0 100644
--- a/services/device/manifest.json
+++ b/services/device/manifest.json
@@ -5,6 +5,7 @@
     "service_manager:connector": {
       "provides": {
         "device:power_monitor": [ "device::mojom::PowerMonitor" ],
+        "device:screen_orientation": [ "device::mojom::ScreenOrientationListener" ],

[blundell, 2017/03/09 16:48:20]

nit: let's call this screen_orientation_listener

[leonhsl(Using Gerrit), 2017/03/10 02:43:06]

I was considering to append also device::mojom::ScreenOrientation into this
category in future, so I named it as device:screen_orientation.
At last would be just like:
"device:screen_orientation": [
  "device::mojom::ScreenOrientation",
  "device::mojom::ScreenOrientationListener",
],

WDYT? Thanks~

         "device:time_zone_monitor": [ "device::mojom::TimeZoneMonitor" ],
 	"device:fingerprint": [ "device::mojom::Fingerprint" ]
       },