Settings: Change 'Model Number' to 'Model Name'

Most devices have the Model Number set to something like 'One' rather
than 'PN072', therefore they are using the Model Name not the Model
Number. Therefore, either every device should update to properly refer
to the Model Number, or we should update Settings to correctly state
that it is the Model Name.

Change-Id: I70981d3a46e7a7e26f4bfcb6c5d768a00314e3b9
Settings: Add screen color settings

Add "Screen Color" item in settings.
This function support set Hue, Saturation, Contrast and Intensity value,
and screen color will be changed by this settings.

Change-Id: If6f6e7ee7f28862476a8b955cd3252175fefa2a1

Settings : Fix CustomScreenColor when picking an image

Change-Id: I510b562eb0e9fb9b558380db5c5d6e818ba17d12

Settings: Start service as explicit intent

Needed for API level 21. Add some ressource bits, set text color to
white.

Change-Id: I9c4a9139be69fa5c6d6c74055b5475f0d930c93a