Revert "Remove support for Valgrind in ART."

This reverts commit 8268cb677bd92bfbcfec7e803775c29687494e53.

Reason for revert: ASAN failures

Change-Id: I7e66d3f3fb461ae4f6dea6ec7d506b7dface3402
Test: SANITIZE_HOST=address m test-art-host
Bug: 77856586
Bug: 29282211
diff --git a/compiler/optimizing/instruction_simplifier.cc b/compiler/optimizing/instruction_simplifier.cc
index 6e618f4..ca84d42 100644
--- a/compiler/optimizing/instruction_simplifier.cc
+++ b/compiler/optimizing/instruction_simplifier.cc
@@ -636,8 +636,8 @@
     return;
   }
 
-  // Historical note: The `outcome` was initialized to please Valgrind - the compiler can reorder
-  // the return value check with the `outcome` check, b/27651442.
+  // Note: The `outcome` is initialized to please valgrind - the compiler can reorder
+  // the return value check with the `outcome` check, b/27651442 .
   bool outcome = false;
   if (TypeCheckHasKnownOutcome(check_cast->GetTargetClassRTI(), object, &outcome)) {
     if (outcome) {
@@ -682,8 +682,8 @@
     return;
   }
 
-  // Historical note: The `outcome` was initialized to please Valgrind - the compiler can reorder
-  // the return value check with the `outcome` check, b/27651442.
+  // Note: The `outcome` is initialized to please valgrind - the compiler can reorder
+  // the return value check with the `outcome` check, b/27651442 .
   bool outcome = false;
   if (TypeCheckHasKnownOutcome(instruction->GetTargetClassRTI(), object, &outcome)) {
     MaybeRecordStat(stats_, MethodCompilationStat::kRemovedInstanceOf);