ART: Implicit checks in the compiler are independent from Runtime

When cross-compiling, those flags are independent. This is an
initial CL that helps bypass fatal failures when cross-compiling,
as not all architectures support (and have turned on) implicit
checks.

The actual transport for the target architecture when it is
different from the runtime needs to be implemented in a follow-up
CL.

Bug: 15703710
Change-Id: Idc881a9a4abfd38643b862a491a5af9b8841f693
diff --git a/compiler/dex/quick/arm64/target_arm64.cc b/compiler/dex/quick/arm64/target_arm64.cc
index fba368a..06e1cda 100644
--- a/compiler/dex/quick/arm64/target_arm64.cc
+++ b/compiler/dex/quick/arm64/target_arm64.cc
@@ -1163,7 +1163,7 @@
   call_state = next_call_insn(cu_, info, call_state, target_method, vtable_idx,
                            direct_code, direct_method, type);
   if (pcrLabel) {
-    if (Runtime::Current()->ExplicitNullChecks()) {
+    if (cu_->compiler_driver->GetCompilerOptions().GetExplicitNullChecks()) {
       *pcrLabel = GenExplicitNullCheck(TargetReg(kArg1), info->opt_flags);
     } else {
       *pcrLabel = nullptr;