Fixed issue where canvas transforms were applied multiple times

in overscroll scenarios on Android Go devices.

Added save/restore around TransformCanvas that is used to replay
filtered drawing instructions to ensure hole punches are carried
through even when a RenderNode is drawn into a layer.
Previously this would end up with transforms being applied twice
during overscroll stretch situations. This caused contents to be
shifted during an overscroll at the end of a HorizontalScrollView
or ScrollView where a SurfaceView was in the scene.

Fixes: 241582783
Test: Added CTS tests to Horizontal and ScrollView tests
Change-Id: Iac1717602fd5f251d3d6fa26109a4c532a9598b5

libs/hwui/pipeline/skia/RenderNodeDrawable.cpp

@@ -293,8 +293,10 @@ void RenderNodeDrawable::drawContent(SkCanvas* canvas) const {
                 // with the same canvas transformation + clip into the target
                 // canvas then draw the layer on top
                 if (renderNode->hasHolePunches()) {
+                    canvas->save();
                     TransformCanvas transformCanvas(canvas, SkBlendMode::kDstOut);
                     displayList->draw(&transformCanvas);
+                    canvas->restore();
                 }
                 canvas->drawImageRect(snapshotImage, SkRect::Make(srcBounds),
                                       SkRect::Make(dstBounds), sampling, &paint,