Second Patch for async RenderEngine

- pass a vector of <LayerSettings> instead of a vector of pointers to
drawLayers function to ensure lifecycle safety.
- capture all local variables to call drawLayerInternals in the render
engine thread to avoid of pointers being invalidated if it takes long
time to pop mFunctions calls.
- change renderScreenImplLocked return type as a shared_future
object to unblock SF main thread for screen capture events.
- block region sampling thread only when SF main thread hasn't
completed capture screen event.

Bug: 180657548
Test: SurfaceFlinger_test, android.hardware.graphics.composer@2.2-vts, libcompositionengine_test, librenderengine_test, libsurfaceflinger_unittest pass
Change-Id: I615f2927d30524988fb12df22fe331e7217c3058
diff --git a/libs/renderengine/gl/GLESRenderEngine.h b/libs/renderengine/gl/GLESRenderEngine.h
index c4adfdf..1d7c2ca 100644
--- a/libs/renderengine/gl/GLESRenderEngine.h
+++ b/libs/renderengine/gl/GLESRenderEngine.h
@@ -104,7 +104,7 @@
     bool canSkipPostRenderCleanup() const override;
     void drawLayersInternal(const std::shared_ptr<std::promise<RenderEngineResult>>&& resultPromise,
                             const DisplaySettings& display,
-                            const std::vector<const LayerSettings*>& layers,
+                            const std::vector<LayerSettings>& layers,
                             const std::shared_ptr<ExternalTexture>& buffer,
                             const bool useFramebufferCache, base::unique_fd&& bufferFence) override;