Fix crash when EGLSurface is no longer valid.

The EGLSurface stored in the pipeline can become obsolete if the
EglManager/RenderThread has to destroy the context.  This CL enables the
RenderThread to notify all active pipelines that their surface is invalid.

Bug: 115290937
Test: hwui_unit_tests
Change-Id: Ib3054822273bc35406630b7442229a81b39a2c91
diff --git a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.h b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.h
index fbdf313..086a760 100644
--- a/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.h
+++ b/libs/hwui/pipeline/skia/SkiaOpenGLPipeline.h
@@ -18,6 +18,8 @@
 
 #include "SkiaPipeline.h"
 
+#include "renderstate/RenderState.h"
+
 namespace android {
 
 class Bitmap;
@@ -25,10 +27,10 @@
 namespace uirenderer {
 namespace skiapipeline {
 
-class SkiaOpenGLPipeline : public SkiaPipeline {
+class SkiaOpenGLPipeline : public SkiaPipeline, public IGpuContextCallback {
 public:
     SkiaOpenGLPipeline(renderthread::RenderThread& thread);
-    virtual ~SkiaOpenGLPipeline() {}
+    virtual ~SkiaOpenGLPipeline();
 
     renderthread::MakeCurrentResult makeCurrent() override;
     renderthread::Frame getFrame() override;
@@ -50,6 +52,9 @@
 
     static void invokeFunctor(const renderthread::RenderThread& thread, Functor* functor);
 
+protected:
+    void onContextDestroyed() override;
+
 private:
     renderthread::EglManager& mEglManager;
     EGLSurface mEglSurface = EGL_NO_SURFACE;