Makes screen attention unsearchable on the devices that don't have the feature

Bug: 178866004
Test: make RunSettingsRoboTests
Change-Id: I8881f6b87be73b2ff75e7dfe294d2dbb75ff73d4

tests/robotests/src/com/android/settings/display/ScreenTimeoutSettingsTest.java

@@ -87,6 +87,7 @@ public class ScreenTimeoutSettingsTest {
                 com.android.internal.R.bool.config_adaptive_sleep_available);
 
         doReturn(null).when(mContext).getSystemService(DevicePolicyManager.class);
+        doReturn(mResources).when(mContext).getResources();
 
         doReturn(mResources).when(mSettings).getResources();
         doReturn(mContext).when(mSettings).getContext();