Add contact lockscreen icon

Change-Id: Ie4833eb3a7cef3268201abc31b245b65fb4c0995
SystemUI: Update brightness dialog, on updateResources()

The small dialog also deserves the chance to get updated
resources.

Thank you Jiangyi, for finding that one.

Patch Set 2: Unbreak things

Change-Id: I6e9de7c35abff52c2fcc2952771bb42b406496ed