Dispatch texture destruction off of render thread for screenshots

This is only enabled when the skia threaded variant renderengine is
enabled. This essentially defers texture deletion until after
drawLayers() is invoked, which shaves off time from the main SF thread.

Bug: 179959621
Bug: 180767535
Test: perfetto trace
Change-Id: I333091d8792fdd0dc01076c73af2956da9ee73df
diff --git a/libs/renderengine/skia/SkiaGLRenderEngine.cpp b/libs/renderengine/skia/SkiaGLRenderEngine.cpp
index 327b04c..7cf672a 100644
--- a/libs/renderengine/skia/SkiaGLRenderEngine.cpp
+++ b/libs/renderengine/skia/SkiaGLRenderEngine.cpp
@@ -266,13 +266,13 @@
 SkiaGLRenderEngine::SkiaGLRenderEngine(const RenderEngineCreationArgs& args, EGLDisplay display,
                                        EGLContext ctxt, EGLSurface placeholder,
                                        EGLContext protectedContext, EGLSurface protectedPlaceholder)
-      : mEGLDisplay(display),
+      : SkiaRenderEngine(args.renderEngineType),
+        mEGLDisplay(display),
         mEGLContext(ctxt),
         mPlaceholderSurface(placeholder),
         mProtectedEGLContext(protectedContext),
         mProtectedPlaceholderSurface(protectedPlaceholder),
-        mUseColorManagement(args.useColorManagement),
-        mRenderEngineType(args.renderEngineType) {
+        mUseColorManagement(args.useColorManagement) {
     sk_sp<const GrGLInterface> glInterface(GrGLCreateNativeInterface());
     LOG_ALWAYS_FATAL_IF(!glInterface.get());
 
diff --git a/libs/renderengine/skia/SkiaGLRenderEngine.h b/libs/renderengine/skia/SkiaGLRenderEngine.h
index 5779ae6..a8853e0 100644
--- a/libs/renderengine/skia/SkiaGLRenderEngine.h
+++ b/libs/renderengine/skia/SkiaGLRenderEngine.h
@@ -129,10 +129,6 @@
     bool mInProtectedContext = false;
     // Object to capture commands send to Skia.
     std::unique_ptr<SkiaCapture> mCapture;
-
-    // Keep this information as a local variable to determine whether the access of the GL
-    // operations is working on the same threads.
-    const RenderEngineType mRenderEngineType = RenderEngineType::SKIA_GL;
 };
 
 } // namespace skia
diff --git a/libs/renderengine/skia/SkiaRenderEngine.h b/libs/renderengine/skia/SkiaRenderEngine.h
index 12b8586..79a1040 100644
--- a/libs/renderengine/skia/SkiaRenderEngine.h
+++ b/libs/renderengine/skia/SkiaRenderEngine.h
@@ -36,6 +36,7 @@
 class SkiaRenderEngine : public RenderEngine {
 public:
     static std::unique_ptr<SkiaRenderEngine> create(const RenderEngineCreationArgs& args);
+    SkiaRenderEngine(RenderEngineType type) : RenderEngine(type) {}
     ~SkiaRenderEngine() override {}
 
     virtual void primeCache() const override{};