New setLocalMatrix() operation for HWUI

Concats any matrix passed through from DisplayListCanvas with the
initialTransform of the containing RenderNode.

BUG:22189925

Change-Id: I5ea54a6e2a29520c79a8860bde7682694e8595d2
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index fc18491..80f349a 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -887,6 +887,7 @@
             && renderer.quickRejectConservative(0, 0, properties().getWidth(), properties().getHeight());
     if (!quickRejected) {
         Matrix4 initialTransform(*(renderer.currentTransform()));
+        renderer.setBaseTransform(initialTransform);
 
         if (drawLayer) {
             handler(new (alloc) DrawLayerOp(mLayer, 0, 0),