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/common_compiler_test.h b/compiler/common_compiler_test.h
index 366489c..e6d1564 100644
--- a/compiler/common_compiler_test.h
+++ b/compiler/common_compiler_test.h
@@ -57,9 +57,9 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
 
  protected:
-  void SetUp() OVERRIDE;
+  void SetUp() override;
 
-  void SetUpRuntimeOptions(RuntimeOptions* options) OVERRIDE;
+  void SetUpRuntimeOptions(RuntimeOptions* options) override;
 
   Compiler::Kind GetCompilerKind() const;
   void SetCompilerKind(Compiler::Kind compiler_kind);
@@ -73,7 +73,7 @@
     return CompilerFilter::kDefaultCompilerFilter;
   }
 
-  void TearDown() OVERRIDE;
+  void TearDown() override;
 
   void CompileClass(mirror::ClassLoader* class_loader, const char* class_name)
       REQUIRES_SHARED(Locks::mutator_lock_);