Fix call stats fragment layout.

Change-Id: I10bf2603a982f11f8e031db0dffa3f7039fa11ea
Improve strings.

Change-Id: I852e220586d41f7c1f6b945a1efd2132fc615c5b
Improve search UI.

Make highlighting color consistent to what is used elsewhere, and fix up
action bar layout theme.

Change-Id: Id4f7d2817e39d1721b96b4a2840a472271317eb2