Use 'final' and 'override' specifiers directly in ART.

Remove all uses of macros 'FINAL' and 'OVERRIDE' and replace them with
'final' and 'override' specifiers. Remove all definitions of these
macros as well, which were located in these files:
- libartbase/base/macros.h
- test/913-heaps/heaps.cc
- test/ti-agent/ti_macros.h

ART is now using C++14; the 'final' and 'override' specifiers have
been introduced in C++11.

Test: mmma art
Change-Id: I256c7758155a71a2940ef2574925a44076feeebf
diff --git a/compiler/optimizing/intrinsics_utils.h b/compiler/optimizing/intrinsics_utils.h
index 8c69d9b..41947f1 100644
--- a/compiler/optimizing/intrinsics_utils.h
+++ b/compiler/optimizing/intrinsics_utils.h
@@ -47,7 +47,7 @@
     return calling_convention_visitor.GetMethodLocation();
   }
 
-  void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
+  void EmitNativeCode(CodeGenerator* codegen) override {
     Assembler* assembler = codegen->GetAssembler();
     assembler->Bind(GetEntryLabel());
 
@@ -73,7 +73,7 @@
     assembler->Jump(GetExitLabel());
   }
 
-  const char* GetDescription() const OVERRIDE { return "IntrinsicSlowPath"; }
+  const char* GetDescription() const override { return "IntrinsicSlowPath"; }
 
  private:
   // The instruction where this slow path is happening.