Use dark background color in dark theme for "no recent searches"
Use dark background color in dark theme for "no recent searches"

Instead of hardcoding the light theme color, use the attribute for the
background color of the search window without recent searches.

Bug: T169891
Change-Id: Ic7828189bcb57a04848830b47daa10bafd86b194

dbrant/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia,wikimedia/apps-android-wikipedia,wikimedia/apps-android-wikipedia,dbrant/apps-android-wikipedia