Fix issue #2547337: switching night modes

Dumb.

Change-Id: Iaa72eaac54422f7fd95cf1050f6b7b6da55af0c3
diff --git a/services/java/com/android/server/UiModeManagerService.java b/services/java/com/android/server/UiModeManagerService.java
index a83af95..c40650a 100644
--- a/services/java/com/android/server/UiModeManagerService.java
+++ b/services/java/com/android/server/UiModeManagerService.java
@@ -484,6 +484,7 @@
                     Intent intent = new Intent(Intent.ACTION_MAIN);
                     intent.addCategory(Intent.CATEGORY_HOME);
                     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                    mHoldingConfiguration = false;
                     updateConfigurationLocked(false);
                     ActivityManagerNative.getDefault().startActivityWithConfig(
                             null, intent, null, null, 0, null, null, 0, false, false,