Add support for dummy draws for Vulkan webview and texture views.

Test: manual testing
Change-Id: Iaec8c3a34367673c281665ff6c6e97d1ce532265
diff --git a/libs/hwui/DeferredLayerUpdater.h b/libs/hwui/DeferredLayerUpdater.h
index 9be415f4..ead8314 100644
--- a/libs/hwui/DeferredLayerUpdater.h
+++ b/libs/hwui/DeferredLayerUpdater.h
@@ -63,8 +63,8 @@
 
     ANDROID_API void setSurfaceTexture(const sp<GLConsumer>& texture, bool needsAttach) {
         if (texture.get() != mSurfaceTexture.get()) {
-            mSurfaceTexture = texture;
             mNeedsGLContextAttach = needsAttach;
+            mSurfaceTexture = texture;
 
             GLenum target = texture->getCurrentTextureTarget();
             LOG_ALWAYS_FATAL_IF(target != GL_TEXTURE_2D && target != GL_TEXTURE_EXTERNAL_OES,
@@ -113,6 +113,8 @@
     Layer* mLayer;
 
     void doUpdateTexImage();
+    void doUpdateVkTexImage();
+    void updateLayer(bool forceFilter, const float* textureTransform);
 };
 
 } /* namespace uirenderer */