[sensorservice] Modernize codebase by replacing NULL with nullptr

Fixes -Wzero-as-null-pointer-constant warning.

Test: m
Bug: 68236239
Change-Id: I9938306410e9773243b2b9c5e2fc4afdb48b9810
diff --git a/services/sensorservice/hidl/EventQueue.cpp b/services/sensorservice/hidl/EventQueue.cpp
index ff20066..b781744 100644
--- a/services/sensorservice/hidl/EventQueue.cpp
+++ b/services/sensorservice/hidl/EventQueue.cpp
@@ -64,7 +64,7 @@
               mInternalQueue(internalQueue) {
 
     mLooper->addFd(internalQueue->getFd(), ALOOPER_POLL_CALLBACK, ALOOPER_EVENT_INPUT,
-            new EventQueueLooperCallback(internalQueue, callback), NULL /* data */);
+            new EventQueueLooperCallback(internalQueue, callback), nullptr /* data */);
 }
 
 void EventQueue::onLastStrongRef(const void *id) {