fuchsia: Don't print error if ColorBuffer already exists.

If CreateColorBuffer2() returns ZX_ERR_ALREADY_EXISTS,
it means the color buffer has already been created and
the driver didn't need to do anything. This is an expected
behavior and it should not print error messages. Instead we
can just print a debug log.

Change-Id: Iaa4d55085d88e3c3f95f8e75ae56a751e6b1d1c6
diff --git a/system/vulkan_enc/ResourceTracker.cpp b/system/vulkan_enc/ResourceTracker.cpp
index 9447dae..d3a23b4 100644
--- a/system/vulkan_enc/ResourceTracker.cpp
+++ b/system/vulkan_enc/ResourceTracker.cpp
@@ -4179,9 +4179,12 @@
 
                     auto result =
                         mControlDevice->CreateColorBuffer2(std::move(vmo), std::move(createParams));
-                    if (!result.ok() || result.Unwrap()->res != ZX_OK) {
+                    if (result.ok() && result.Unwrap()->res == ZX_ERR_ALREADY_EXISTS) {
+                        ALOGD(
+                            "CreateColorBuffer: color buffer already exists\n");
+                    } else {
                         ALOGE("CreateColorBuffer failed: %d:%d", result.status(),
-                              GET_STATUS_SAFE(result, res));
+                            GET_STATUS_SAFE(result, res));
                     }
                 }