Add Night Light Suggestion and tests

Night Light settings suggestion will only show when the user
has not previously interacted with Night Light.

Bug: 37207263
Test: make ROBOTEST_FILTER=\
"(SettingsSuggestionsTest|SuggestionFeatureProviderImplTest)"\
RunSettingsRoboTests
Change-Id: I432d5fef19f5e4a52503da136b044598cb82164a

tests/robotests/src/com/android/settings/gestures/DoubleTwistPreferenceControllerTest.java

@@ -26,7 +26,6 @@ import com.android.settings.testutils.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 import com.android.settings.testutils.shadow.ShadowSecureSettings;
 
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -65,11 +64,6 @@ public class DoubleTwistPreferenceControllerTest {
         mController = new DoubleTwistPreferenceController(mContext, null, KEY_DOUBLE_TWIST);
     }
 
-    @After
-    public void tearDown() {
-        ShadowSecureSettings.clear();
-    }
-
     @Test
     public void isAvailable_hasSensor_shouldReturnTrue() {
         // Mock sensors