Fix enum comparison to reenable -Wenum-compare

Test: m
Change-Id: Id0e0907a53416b49a149e43e4f5c6fb18fd6aaaa
diff --git a/media/libheif/HeifDecoderImpl.cpp b/media/libheif/HeifDecoderImpl.cpp
index 273d91c..fcac551 100644
--- a/media/libheif/HeifDecoderImpl.cpp
+++ b/media/libheif/HeifDecoderImpl.cpp
@@ -15,6 +15,7 @@
  */
 
 //#define LOG_NDEBUG 0
+#include "include/HeifDecoderAPI.h"
 #define LOG_TAG "HeifDecoderImpl"
 
 #include "HeifDecoderImpl.h"
@@ -464,7 +465,7 @@
 }
 
 bool HeifDecoderImpl::setOutputColor(HeifColorFormat heifColor) {
-    if (heifColor == mOutputColor) {
+    if (heifColor == (HeifColorFormat)mOutputColor) {
         return true;
     }