Use shell permission to query current user

Use shell permissions to obtain CREATE_USERS to call
ActivityManager.getCurrentUser in ConnectivityServiceTest.

This is necessary to allow the tests to run in coverage tests without
the platform certificate.

Bug: 187935317
Test: atest FrameworksNetTests:ConnectivityServiceTest
Change-Id: I5a56ffab4820d351dcdb132046698cd0d3b8bdb1

service/src/com/android/server/ConnectivityService.java

@@ -1247,6 +1247,13 @@ public class ConnectivityService extends IConnectivityManager.Stub
         public boolean getCellular464XlatEnabled() {
             return NetworkProperties.isCellular464XlatEnabled().orElse(true);
         }
+
+        /**
+         * Create a {@link LocationPermissionChecker}.
+         */
+        public LocationPermissionChecker makeLocationPermissionChecker(Context context) {
+            return new LocationPermissionChecker(context);
+        }
     }
 
     public ConnectivityService(Context context) {
@@ -1314,7 +1321,7 @@ public class ConnectivityService extends IConnectivityManager.Stub
         mNetd = netd;
         mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
         mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
-        mLocationPermissionChecker = new LocationPermissionChecker(mContext);
+        mLocationPermissionChecker = mDeps.makeLocationPermissionChecker(mContext);
 
         // To ensure uid state is synchronized with Network Policy, register for
         // NetworkPolicyManagerService events must happen prior to NetworkPolicyManagerService