Improve code sinking near "always throwing" method calls

Rationale:
With simple dex bytecode analysis, the inliner marks methods
that always throw to help subsequent code sinking. This reduces
overhead of non-nullable enforcing calls found in e.g the Kotlin
runtime library (1%-2% improvement on tree microbenchmark, about
5% on Denis' benchmark).

Test: test-art-host test-art-target

Change-Id: I45348f049721476828eb5443738021720d2857c0
diff --git a/compiler/optimizing/optimizing_compiler_stats.h b/compiler/optimizing/optimizing_compiler_stats.h
index 32a94ab..0023265 100644
--- a/compiler/optimizing/optimizing_compiler_stats.h
+++ b/compiler/optimizing/optimizing_compiler_stats.h
@@ -75,6 +75,7 @@
   kImplicitNullCheckGenerated,
   kExplicitNullCheckGenerated,
   kSimplifyIf,
+  kSimplifyThrowingInvoke,
   kInstructionSunk,
   kNotInlinedUnresolvedEntrypoint,
   kNotInlinedDexCache,