Migrate some last instances of GrContext to GrDirectContext

This is a rename with no functional changes.

Change-Id: I4b0b7ee1926b688029e257b35c469113c0404a5b
diff --git a/libs/hwui/pipeline/skia/ShaderCache.cpp b/libs/hwui/pipeline/skia/ShaderCache.cpp
index 66aa8c2..3baff7e 100644
--- a/libs/hwui/pipeline/skia/ShaderCache.cpp
+++ b/libs/hwui/pipeline/skia/ShaderCache.cpp
@@ -15,7 +15,7 @@
  */
 
 #include "ShaderCache.h"
-#include <GrContext.h>
+#include <GrDirectContext.h>
 #include <log/log.h>
 #include <openssl/sha.h>
 #include <algorithm>
@@ -206,7 +206,7 @@
     }
 }
 
-void ShaderCache::onVkFrameFlushed(GrContext* context) {
+void ShaderCache::onVkFrameFlushed(GrDirectContext* context) {
     {
         std::lock_guard<std::mutex> lock(mMutex);