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/libs/gui/tests/EndToEndNativeInputTest.cpp b/libs/gui/tests/EndToEndNativeInputTest.cpp
index 1a623e2..c59afba 100644
--- a/libs/gui/tests/EndToEndNativeInputTest.cpp
+++ b/libs/gui/tests/EndToEndNativeInputTest.cpp
@@ -82,7 +82,8 @@
                                                                int width, int height) {
         sp<SurfaceControl> surfaceControl =
                 scc->createSurface(String8("Test Surface"), 0 /* bufHeight */, 0 /* bufWidth */,
-                                   PIXEL_FORMAT_RGBA_8888, ISurfaceComposerClient::eFXSurfaceColor);
+                                   PIXEL_FORMAT_RGBA_8888,
+                                   ISurfaceComposerClient::eFXSurfaceEffect);
         return std::make_unique<InputSurface>(surfaceControl, width, height);
     }