Adding missing locked accesses to mRouting variable.

Test: runtest -x packages/services/Car/tests/carservice_test/src/com/android/car/test/VmsPublisherClientServiceTest.java
Test: runtest -x packages/services/Car/tests/carservice_test/src/com/android/car/test/VmsPublisherSubscriberTest.java
Test: runtest -x packages/services/Car/tests/carservice_test/src/com/android/car/test/VmsSubscriberManagerTest.java
Test: runtest -x packages/services/Car/tests/carservice_unit_test/src/com/android/car/VmsRoutingTest.java

Bug: 36119432
Change-Id: I1fe85fec0757047af39da79724cdf382221ccb9b
1 file changed