Revert of Moved ambient lights out of SkLight's light array

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index c4ce75c6c0f881e96701a8f92a132c6338be6cd9..fc1897526cde8679dab48cd323db81362c829fda 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -3231,7 +3231,8 @@
         // skip over ambient lights; they don't cast shadows
         // lights that have shadow maps do not need updating (because lights are immutable)
 
-        if (fLights->light(i).getShadowMap() != nullptr) {
+        if (SkLights::Light::kAmbient_LightType == fLights->light(i).type() ||
+            fLights->light(i).getShadowMap() != nullptr) {
             continue;
         }