Make some display related slices public.

Only PreferenceControllers with isPublicSlice() set to true are exposed
to other apps. Others will be Settings only.

Bug: 141088937
Test: robotests
Change-Id: I2a36da4ac4bb14a4d2ac7b89ab2bb3ebf8e655f7

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

@@ -35,7 +35,6 @@ import com.android.settings.core.BasePreferenceController;
 import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.shadow.ShadowRotationPolicy;
 
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -153,6 +152,11 @@ public class AutoRotatePreferenceControllerTest {
         assertThat(controller.isSliceable()).isFalse();
     }
 
+    @Test
+    public void isPublicSlice_returnTrue() {
+        assertThat(mController.isPublicSlice()).isTrue();
+    }
+
     private void enableAutoRotationPreference() {
         when(mPackageManager.hasSystemFeature(anyString())).thenReturn(true);
         when(mContext.getResources().getBoolean(anyInt())).thenReturn(true);