[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) {
diff --git a/services/sensorservice/hidl/SensorManager.cpp b/services/sensorservice/hidl/SensorManager.cpp
index fee6da1..9380600 100644
--- a/services/sensorservice/hidl/SensorManager.cpp
+++ b/services/sensorservice/hidl/SensorManager.cpp
@@ -157,7 +157,7 @@
             JavaVMAttachArgs args{
                 .version = JNI_VERSION_1_2,
                 .name = POLL_THREAD_NAME,
-                .group = NULL
+                .group = nullptr
             };
             JNIEnv* env;
             if (javaVm->AttachCurrentThread(&env, &args) != JNI_OK) {