Fix: Release skia resources when RenderNode layer is configured

-Updated StretchEffect to null out the child texture
of the SkRuntimeEffectBuilder after the shader is created
-Release optional mask surface used for
stretching the hole punch
-Release SkRuntimeEffectBuilder instance on RenderNode's
StretchEffect

Fixes: 183592264
Test: manual + re-ran cts tests
Change-Id: I90952666d7489985de9ce798ab792cf3fd7f6087

libs/hwui/RenderNode.h

@@ -331,6 +331,8 @@ public:
             mSkiaLayer.reset();
         }
 
+        mProperties.mutateLayerProperties().mutableStretchEffect().clear();
+        mStretchMask.clear();
         // Clear out the previous snapshot and the image filter the previous
         // snapshot was created with whenever the layer changes.
         mSnapshotResult.snapshot = nullptr;

libs/hwui/effects/StretchEffect.cpp

@@ -186,6 +186,7 @@ static const SkString stretchShader = SkString(R"(
 
 static const float ZERO = 0.f;
 static const float INTERPOLATION_STRENGTH_VALUE = 0.7f;
+static const char CONTENT_TEXTURE[] = "uContentTexture";
 
 sk_sp<SkShader> StretchEffect::getShader(float width, float height,
                                          const sk_sp<SkImage>& snapshotImage,
@@ -207,7 +208,7 @@ sk_sp<SkShader> StretchEffect::getShader(float width, float height,
         mBuilder = std::make_unique<SkRuntimeShaderBuilder>(getStretchEffect());
     }
 
-    mBuilder->child("uContentTexture") =
+    mBuilder->child(CONTENT_TEXTURE) =
             snapshotImage->makeShader(SkTileMode::kClamp, SkTileMode::kClamp,
                                       SkSamplingOptions(SkFilterMode::kLinear), matrix);
     mBuilder->uniform("uInterpolationStrength").set(&INTERPOLATION_STRENGTH_VALUE, 1);
@@ -226,7 +227,9 @@ sk_sp<SkShader> StretchEffect::getShader(float width, float height,
     mBuilder->uniform("viewportWidth").set(&width, 1);
     mBuilder->uniform("viewportHeight").set(&height, 1);
 
-    return mBuilder->makeShader(nullptr, false);
+    auto result = mBuilder->makeShader(nullptr, false);
+    mBuilder->child(CONTENT_TEXTURE) = nullptr;
+    return result;
 }
 
 sk_sp<SkRuntimeEffect> StretchEffect::getStretchEffect() {

libs/hwui/effects/StretchEffect.h

@@ -113,6 +113,10 @@ public:
         return !isEmpty();
     }
 
+    void clear() {
+        mBuilder = nullptr;
+    }
+
 private:
     static sk_sp<SkRuntimeEffect> getStretchEffect();
     mutable SkVector mStretchDirection{0, 0};