Replace NULL/0 with nullptr

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

clang-tidy -checks=modernize-use-nullptr -p compile_commands.json -fix ...

Test: m
Bug: 68236239
Change-Id: I3a8e982ba40f9b029bafef78437b146a878f56a9
diff --git a/libs/gui/SyncFeatures.cpp b/libs/gui/SyncFeatures.cpp
index afa15c5..fcae05c 100644
--- a/libs/gui/SyncFeatures.cpp
+++ b/libs/gui/SyncFeatures.cpp
@@ -41,7 +41,7 @@
     // This can only be called after EGL has been initialized; otherwise the
     // check below will abort.
     const char* exts = eglQueryStringImplementationANDROID(dpy, EGL_EXTENSIONS);
-    LOG_ALWAYS_FATAL_IF(exts == NULL, "eglQueryStringImplementationANDROID failed");
+    LOG_ALWAYS_FATAL_IF(exts == nullptr, "eglQueryStringImplementationANDROID failed");
     if (strstr(exts, "EGL_ANDROID_native_fence_sync")) {
         // This makes GLConsumer use the EGL_ANDROID_native_fence_sync
         // extension to create Android native fences to signal when all