Rename ColorLayer to EffectLayer to handle both shadows and color fill

We want the ability for a layer to render shadows without any content.
This new layer type will be able to combine effects as needed.

Test: presubmit tests (no functional changes)
Test: go/wm-smoke
Change-Id: I8663d126a23263a3d7dc799d39a9cf44b3b6e4a0
diff --git a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
index cffdc14..edd9de4 100644
--- a/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/RefreshRateSelectionTest.cpp
@@ -27,7 +27,7 @@
 
 #include "BufferQueueLayer.h"
 #include "BufferStateLayer.h"
-#include "ColorLayer.h"
+#include "EffectLayer.h"
 #include "Layer.h"
 #include "TestableSurfaceFlinger.h"
 #include "mock/DisplayHardware/MockComposer.h"
@@ -68,7 +68,7 @@
     void setupComposer(int virtualDisplayCount);
     sp<BufferQueueLayer> createBufferQueueLayer();
     sp<BufferStateLayer> createBufferStateLayer();
-    sp<ColorLayer> createColorLayer();
+    sp<EffectLayer> createEffectLayer();
 
     void setParent(Layer* child, Layer* parent);
     void commitTransaction(Layer* layer);
@@ -111,11 +111,11 @@
     return new BufferStateLayer(args);
 }
 
-sp<ColorLayer> RefreshRateSelectionTest::createColorLayer() {
+sp<EffectLayer> RefreshRateSelectionTest::createEffectLayer() {
     sp<Client> client;
     LayerCreationArgs args(mFlinger.flinger(), client, "color-layer", WIDTH, HEIGHT, LAYER_FLAGS,
                            LayerMetadata());
-    return new ColorLayer(args);
+    return new EffectLayer(args);
 }
 
 void RefreshRateSelectionTest::setParent(Layer* child, Layer* parent) {
@@ -244,11 +244,11 @@
     ASSERT_EQ(1, mGrandChild->getFrameRateSelectionPriority());
 }
 
-TEST_F(RefreshRateSelectionTest, testPriorityOnColorLayers) {
-    mParent = createColorLayer();
-    mChild = createColorLayer();
+TEST_F(RefreshRateSelectionTest, testPriorityOnEffectLayers) {
+    mParent = createEffectLayer();
+    mChild = createEffectLayer();
     setParent(mChild.get(), mParent.get());
-    mGrandChild = createColorLayer();
+    mGrandChild = createEffectLayer();
     setParent(mGrandChild.get(), mChild.get());
 
     ASSERT_EQ(PRIORITY_UNSET, mParent->getFrameRateSelectionPriority());