pathops coincident work

This is working towards fixing all bugs around simplifying the tiger.

This installment simplifies the point-t intersection list as it is built rather than doing the analysis once the intersections are complete. This avoids getting the list in an inconsistent state and makes coincident checks faster and more stable.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2237223002

TBR=reed@google.com
BUG=skia:5131

Review-Url: https://codereview.chromium.org/2237223002
diff --git a/tests/PathOpsSimplifyFailTest.cpp b/tests/PathOpsSimplifyFailTest.cpp
index 977e47c..4da43b8 100644
--- a/tests/PathOpsSimplifyFailTest.cpp
+++ b/tests/PathOpsSimplifyFailTest.cpp
@@ -103,7 +103,7 @@
     path.lineTo(SkBits2Float(0x428c0000), SkBits2Float(0xce58f419));  // 70, -9.09969e+08f
     path.lineTo(SkBits2Float(0x430c0000), SkBits2Float(0xce58f41c));  // 140, -9.09969e+08f
     path.close();
-    testSimplifyCheck(reporter, path, filename, true);
+    testSimplifyFuzz(reporter, path, filename);
 }
 
 static void fuzz_x1(skiatest::Reporter* reporter, const char* filename) {