Settings : Scroll to preference on search and highlight

Change-Id: I93c4106d022b416205cc33cf5dbdf5d7635a002a

Conflicts:
	res/values/colors.xml
	src/com/android/settings/SettingsPreferenceFragment.java
	src/com/android/settings/search/SearchPopulator.java
	src/com/android/settings/search/SettingsSearchFilterAdapter.java