Fix brightness dialog layout.

This reverts part of change I83e8f7eae65d5f40dd7aeb2b663bc1fc3d5324d2.

Change-Id: I1f685357776dcac9c93e592e274acdf0497f4161
Merge branch 'cm-10.2' of git://github.com/CyanogenMod/android_frameworks_base into cm-10.2