Update primary and accent colors

[abelgardep]

Continuation of #2991 Color inconsistency. Should follow this guideline

Old colors	New colors

• Update primary and accent color
• Update icon background color. Old iteration: make adaptive icon based on png #2261
• Multi-selection checkbox uses the old color, is an image, and it is not brandable. We should switch to a checkbox with accent color. (Should we move it to a new iteration?)

[theScrabi]

Here is the updated icon:

Old colors	New colors

[jesmrec]

Should the notification icon be re-done with the new colors?

https://github.com/owncloud/android/blob/master/owncloudApp/src/main/res/drawable-xhdpi/notification_icon.png

[abelgardep]

Should the notification icon be re-done with the new colors?

https://github.com/owncloud/android/blob/master/owncloudApp/src/main/res/drawable-xhdpi/notification_icon.png

Good catch, i think so

[jesmrec]

Notification icon updated. No much to test here, new values replace the older ones following the oC guidelines. Always open to new iterations.

Approved.