Don't persist new night mode setting in car mode

Keep persist.sys.theme in sync with the primary user's
setting value UI_NIGHT_MODE

Test: manual
Fixes: 137174308
Change-Id: I8df67e0734b08bd82418e381d153d9012ecf99e4
(cherry picked from commit 47a775b67de77317f6ad357a9c4a3d88da846253)
(cherry picked from commit 98288b3e0f8819020ad98f9cf49d4375c5e7db89)
diff --git a/services/core/java/com/android/server/UiModeManagerService.java b/services/core/java/com/android/server/UiModeManagerService.java
index bc7da3f..30a3563 100644
--- a/services/core/java/com/android/server/UiModeManagerService.java
+++ b/services/core/java/com/android/server/UiModeManagerService.java
@@ -413,15 +413,15 @@
             try {
                 synchronized (mLock) {
                     if (mNightMode != mode) {
-                        if (UserManager.get(getContext()).isPrimaryUser()) {
-                            SystemProperties.set(SYSTEM_PROPERTY_DEVICE_THEME,
-                                    Integer.toString(mode));
-                        }
-
                         // Only persist setting if not in car mode
                         if (!mCarModeEnabled) {
                             Secure.putIntForUser(getContext().getContentResolver(),
                                     Secure.UI_NIGHT_MODE, mode, user);
+
+                            if (UserManager.get(getContext()).isPrimaryUser()) {
+                                SystemProperties.set(SYSTEM_PROPERTY_DEVICE_THEME,
+                                        Integer.toString(mode));
+                            }
                         }
 
                         mNightMode = mode;