Switch default renderer to back to Skia's OpenGL pipeline once more.

Bug: 63910712
Test: CtsGraphicsTestCases, CtsUiRenderingTestCases, CtsViewTestCases
Change-Id: Idb862a0dece6b13dc7a105f6a47e4e33911ecc4a
diff --git a/libs/hwui/Properties.cpp b/libs/hwui/Properties.cpp
index fe291d2..3b59bb1 100644
--- a/libs/hwui/Properties.cpp
+++ b/libs/hwui/Properties.cpp
@@ -177,7 +177,7 @@
         return sRenderPipelineType;
     }
     char prop[PROPERTY_VALUE_MAX];
-    property_get(PROPERTY_RENDERER, prop, "opengl");
+    property_get(PROPERTY_RENDERER, prop, "skiagl");
     if (!strcmp(prop, "skiagl") ) {
         ALOGD("Skia GL Pipeline");
         sRenderPipelineType = RenderPipelineType::SkiaGL;