Revert of Set analytic AA as default.

src/core/SkScan.cpp

Index: src/core/SkScan.cpp
diff --git a/src/core/SkScan.cpp b/src/core/SkScan.cpp
index 5a02c61b4484a5b90504d6af3fb8777cef25f242..a7ecf31826aec4d9f61c1fffade68f96366908b8 100644
--- a/src/core/SkScan.cpp
+++ b/src/core/SkScan.cpp
@@ -10,10 +10,10 @@
 #include "SkBlitter.h"
 #include "SkRasterClip.h"
 
-#ifdef SK_NO_ANALYTIC_AA
+#ifdef SK_ANALYTIC_AA
+    std::atomic<bool> gSkUseAnalyticAA{true};
+#else
     std::atomic<bool> gSkUseAnalyticAA{false};
-#else
-    std::atomic<bool> gSkUseAnalyticAA{true};
 #endif
 
 static inline void blitrect(SkBlitter* blitter, const SkIRect& r) {