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
Merge "SystemUI: Update brightness dialog, on updateResources()" into cm-10.1