Revert "Settings search - Navigate user to exact page"

This reverts commit 08f2a58459.

Reason for revert: design changed, we decide to take the user to
the entry after clicking on a search result.
It's opposite with what we did, so we revert related CL first.

Test: robotest

Change-Id: Iadb9a94a7ef7838be34a54499e2d934d6396c336

res/xml/when_to_dream_settings.xml

@@ -17,5 +17,4 @@
 
 <PreferenceScreen
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:key="screensaver_when_to_dream_screen"
     android:title="@string/screensaver_settings_when_to_dream" />