Change how distance field paths are disabled

The path renderer bitfield will soon be private (for Skia testing
only), so switch to using the public flag.

Test: Simple refactoring change, still builds
Change-Id: I6715ba8addd0e104a46842f2398320d1904bb187
diff --git a/libs/hwui/renderthread/EglManager.cpp b/libs/hwui/renderthread/EglManager.cpp
index 16d7736..87e5bfd 100644
--- a/libs/hwui/renderthread/EglManager.cpp
+++ b/libs/hwui/renderthread/EglManager.cpp
@@ -138,7 +138,7 @@
         LOG_ALWAYS_FATAL_IF(!glInterface.get());
 
         GrContextOptions options;
-        options.fGpuPathRenderers &= ~GrContextOptions::GpuPathRenderers::kDistanceField;
+        options.fDisableDistanceFieldPaths = true;
         mRenderThread.cacheManager().configureContext(&options);
         mRenderThread.setGrContext(GrContext::Create(GrBackend::kOpenGL_GrBackend,
                 (GrBackendContext)glInterface.get(), options));