Don't assume SYSTEM is current user on boot

Auto and chrome can apparently use different users at boot.

Bug: 137204067
Test: manual
Change-Id: I61371bcc167a39e6344fe457dca56f0003910ce8
(cherry picked from commit db49bea153)

services/core/java/com/android/server/LocationManagerService.java

@@ -466,7 +466,7 @@ public class LocationManagerService extends ILocationManager.Stub {
         // the user being changed will cause a reload of all user specific settings, which causes
         // provider initialization, and propagates changes until a steady state is reached
         mCurrentUserId = UserHandle.USER_NULL;
-        onUserChangedLocked(UserHandle.USER_SYSTEM);
+        onUserChangedLocked(ActivityManager.getCurrentUser());
 
         // initialize in-memory settings values
         onBackgroundThrottleWhitelistChangedLocked();