[input] Modernize codebase by replacing NULL with nullptr

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

Test: m
Bug: 68236239
Change-Id: I8882234efd2a0b3ef27472d3f5d4e9c69c6e7b37
diff --git a/libs/input/tests/InputPublisherAndConsumer_test.cpp b/libs/input/tests/InputPublisherAndConsumer_test.cpp
index 13617bf..0788c89 100644
--- a/libs/input/tests/InputPublisherAndConsumer_test.cpp
+++ b/libs/input/tests/InputPublisherAndConsumer_test.cpp
@@ -46,12 +46,12 @@
     virtual void TearDown() {
         if (mPublisher) {
             delete mPublisher;
-            mPublisher = NULL;
+            mPublisher = nullptr;
         }
 
         if (mConsumer) {
             delete mConsumer;
-            mConsumer = NULL;
+            mConsumer = nullptr;
         }
 
         serverChannel.clear();
@@ -94,7 +94,7 @@
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
-    ASSERT_TRUE(event != NULL)
+    ASSERT_TRUE(event != nullptr)
             << "consumer should have returned non-NULL event";
     ASSERT_EQ(AINPUT_EVENT_TYPE_KEY, event->getType())
             << "consumer should have returned a key event";
@@ -180,7 +180,7 @@
     ASSERT_EQ(OK, status)
             << "consumer consume should return OK";
 
-    ASSERT_TRUE(event != NULL)
+    ASSERT_TRUE(event != nullptr)
             << "consumer should have returned non-NULL event";
     ASSERT_EQ(AINPUT_EVENT_TYPE_MOTION, event->getType())
             << "consumer should have returned a motion event";