EBS should always be able to toggle UiMode

The fact that the UiMode permission is in place doesn't
mean that Battery Saver should not be able to toggle it.

Test: manually toggle setting
Change-Id: I9c73f04ef8d7f99fdffc896c5f6c001c87e17924
diff --git a/services/core/java/com/android/server/UiModeManagerService.java b/services/core/java/com/android/server/UiModeManagerService.java
index cb03255..f436286 100644
--- a/services/core/java/com/android/server/UiModeManagerService.java
+++ b/services/core/java/com/android/server/UiModeManagerService.java
@@ -42,31 +42,25 @@
 import android.os.ServiceManager;
 import android.os.ShellCallback;
 import android.os.ShellCommand;
-import android.os.SystemProperties;
 import android.os.UserHandle;
 import android.provider.Settings;
 import android.service.dreams.Sandman;
 import android.service.vr.IVrManager;
 import android.service.vr.IVrStateCallbacks;
-import android.text.TextUtils;
 import android.util.Slog;
 
-import java.io.File;
-import java.io.FileDescriptor;
-import java.io.PrintWriter;
-import java.util.ArrayList;
-import java.util.Collections;
-
 import com.android.internal.R;
 import com.android.internal.app.DisableCarModeActivity;
 import com.android.internal.messages.nano.SystemMessageProto.SystemMessage;
 import com.android.internal.notification.SystemNotificationChannels;
 import com.android.internal.util.DumpUtils;
-import com.android.server.power.ShutdownThread;
 import com.android.server.twilight.TwilightListener;
 import com.android.server.twilight.TwilightManager;
 import com.android.server.twilight.TwilightState;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+
 final class UiModeManagerService extends SystemService {
     private static final String TAG = UiModeManager.class.getSimpleName();
     private static final boolean LOG = false;
@@ -466,7 +460,7 @@
             uiMode |= mNightMode << 4;
         }
 
-        if (mPowerSave && !mNightModeLocked) {
+        if (mPowerSave) {
             uiMode &= ~Configuration.UI_MODE_NIGHT_NO;
             uiMode |= Configuration.UI_MODE_NIGHT_YES;
         }