SystemUI: Reinflate on theme change

Reflect the updated assets immediately once the config_changed
notification happens

Change-Id: I480a719fbdd45875277871af39ce65849918ec0a
Re-add auto brightness configuration UI (1/2)

- Add a button into the new brightness dialog that allows opening the
  auto brightness setup
- Enable auto-brightness adjustment (setting for general brighter/darker
  adjustment) and twilight adjustment

Change-Id: I7fd11ddaa112396dcb7508692aacb93bfe3da256
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0