Dialer: Improve Material You design

* Make action bar in Settings and Call stats follow deeper accent color (similar to Messaging and Contacts)
* Fix mismatch statusbar in call stats history
* Fix search bar color for light theme
* Fix background to follow slightly deeper neutral color (similar to Messaging and Contacts)
* Remove some duplicate attributes in styles

Change-Id: I09001b15f42c8ba0b06285bcf04896f86f5d3f7b