Merge changes from topic 'music_extraction' into oc-dev

* changes:
  Make music notifications not dimmable
  Implementing gradual image fade for the media template
  Extracting the notification colors based on the album art
  Moved notification builder creation to the background

diff --cc core/java/android/app/Notification.java
Simple merge

diff --cc core/res/res/values/symbols.xml
Simple merge