Revert some changes made in ag/5883994.

- some settings theme customization has been removed. This revert part
of that change to add back some defined color to make the action bar
white again, and also restore the corner radius customization.

Bug: 117401043
Test: visual
Change-Id: Ia2209750d139e34a5c0d0aa2ca497a61e3d0b084