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/test/1945-proxy-method-arguments/get_args.cc b/test/1945-proxy-method-arguments/get_args.cc
index 211ae10..859e229 100644
--- a/test/1945-proxy-method-arguments/get_args.cc
+++ b/test/1945-proxy-method-arguments/get_args.cc
@@ -27,7 +27,7 @@
 namespace {
 
 // Visit a proxy method Quick frame at a given depth.
-class GetProxyQuickFrameVisitor FINAL : public StackVisitor {
+class GetProxyQuickFrameVisitor final : public StackVisitor {
  public:
   GetProxyQuickFrameVisitor(art::Thread* target, art::Context* ctx, size_t frame_depth)
       REQUIRES_SHARED(art::Locks::mutator_lock_)
@@ -36,7 +36,7 @@
         frame_depth_(frame_depth),
         quick_frame_(nullptr) {}
 
-  bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
+  bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
     if (GetMethod()->IsRuntimeMethod()) {
       return true;
     }