EGL: Add flag for bugfixes found via advanced blobcache usage

Test: libEGL_test, EGL_test
Bug: b/351867582, b/380483358
Flag: com.android.graphics.egl.flags.multifile_blobcache_advanced_usage
Change-Id: I08c8b2e1e255caead4333b69e0a94148a3b4f0b1
diff --git a/opengl/libs/EGL/MultifileBlobCache.h b/opengl/libs/EGL/MultifileBlobCache.h
index 65aa2db..fe477bc 100644
--- a/opengl/libs/EGL/MultifileBlobCache.h
+++ b/opengl/libs/EGL/MultifileBlobCache.h
@@ -32,6 +32,10 @@
 
 #include "FileBlobCache.h"
 
+#include <com_android_graphics_egl_flags.h>
+
+using namespace com::android::graphics::egl;
+
 namespace android {
 
 constexpr uint32_t kMultifileBlobCacheVersion = 2;