Change return values of type status_t from NO_ERROR to OK

in bufferhub related directories

Bug: 118696702
Fixes: 118696702
Test: all tests pass.
AHardwareBufferTest BufferHubBuffer_test BufferHubMetadata_test
buffer_hub_binder_service-test buffer_hub_queue_producer-test
libgui_test libsensor_test vrflinger_test buffer_hub-test
buffer_hub_queue-test dvr_buffer_queue-test dvr_api-test
dvr_display-test

Change-Id: Iee198ddbec035856185fcab34b0d631bd3726b77
diff --git a/libs/vr/libbufferhub/ion_buffer.cpp b/libs/vr/libbufferhub/ion_buffer.cpp
index 1295531..1965410 100644
--- a/libs/vr/libbufferhub/ion_buffer.cpp
+++ b/libs/vr/libbufferhub/ion_buffer.cpp
@@ -205,7 +205,7 @@
 
   status_t err =
       buffer_->lock(usage, Rect(x, y, x + width, y + height), address);
-  if (err != NO_ERROR)
+  if (err != OK)
     return -EINVAL;
   else
     return 0;
@@ -220,7 +220,7 @@
 
   status_t err =
       buffer_->lockYCbCr(usage, Rect(x, y, x + width, y + height), yuv);
-  if (err != NO_ERROR)
+  if (err != OK)
     return -EINVAL;
   else
     return 0;
@@ -231,7 +231,7 @@
   ALOGD_IF(TRACE, "IonBuffer::Unlock: handle=%p", handle());
 
   status_t err = buffer_->unlock();
-  if (err != NO_ERROR)
+  if (err != OK)
     return -EINVAL;
   else
     return 0;