Consistent color between status bar and app bar

In Android S, we add the transparent color to navigation bar
and status bar for consistent color between status bar and
app bar. So, we should add this change for oveall setting
theme since most pages should apply new app bar now.

Thus, we don't need to override the subsetting style for different
activities one by one.

Homepage doesn't have new Android S tool bar, so we shouldn't adopt it.

Test: Try to launch all the pages as many as possible.
Fix: 190797935
Change-Id: Ic4083de5477371f1d0eea2d66f020e4469fa3f86