surfaceflinger: remove EGLConfig from DisplayDevice ctor

It is queryable from RenderEngine.

Test: SurfaceFlinger_test
Change-Id: Id976f831f846b9ff7a5f6d8578cfe1787d55da86
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 302f038..1bce4e9 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -88,7 +88,6 @@
         const wp<IBinder>& displayToken,
         const sp<DisplaySurface>& displaySurface,
         const sp<IGraphicBufferProducer>& producer,
-        EGLConfig config,
         bool supportWideColor)
     : lastCompositionHadVisibleLayers(false),
       mFlinger(flinger),
@@ -121,6 +120,7 @@
 
     EGLSurface eglSurface;
     EGLDisplay display = mFlinger->getRenderEngine().getEGLDisplay();
+    EGLConfig config = mFlinger->getRenderEngine().getEGLConfig();
 
     if (config == EGL_NO_CONFIG) {
         config = RenderEngine::chooseEglConfig(display, PIXEL_FORMAT_RGBA_8888,