Add support for uploading to AHBs using Vulkan.

Test: manual build and testing on blueline.

Change-Id: I240a5f1e3ba34677b03131eba36ffd8783d99041
diff --git a/libs/hwui/HardwareBitmapUploader.h b/libs/hwui/HardwareBitmapUploader.h
index 6f41e6d..c300593 100644
--- a/libs/hwui/HardwareBitmapUploader.h
+++ b/libs/hwui/HardwareBitmapUploader.h
@@ -22,9 +22,11 @@
 
 class ANDROID_API HardwareBitmapUploader {
 public:
-    static sk_sp<Bitmap> allocateHardwareBitmap(const SkBitmap& sourceBitmap);
+    static void initialize();
     static void terminate();
 
+    static sk_sp<Bitmap> allocateHardwareBitmap(const SkBitmap& sourceBitmap);
+
     static bool hasFP16Support();
 };