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/disassembler/disassembler_mips.h b/disassembler/disassembler_mips.h
index afa6af3..bc74b43 100644
--- a/disassembler/disassembler_mips.h
+++ b/disassembler/disassembler_mips.h
@@ -24,7 +24,7 @@
 namespace art {
 namespace mips {
 
-class DisassemblerMips FINAL : public Disassembler {
+class DisassemblerMips final : public Disassembler {
  public:
   explicit DisassemblerMips(DisassemblerOptions* options, bool is_o32_abi)
       : Disassembler(options),
@@ -33,8 +33,8 @@
         is_o32_abi_(is_o32_abi) {}
 
   const char* RegName(uint32_t reg);
-  size_t Dump(std::ostream& os, const uint8_t* begin) OVERRIDE;
-  void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) OVERRIDE;
+  size_t Dump(std::ostream& os, const uint8_t* begin) override;
+  void Dump(std::ostream& os, const uint8_t* begin, const uint8_t* end) override;
 
  private:
   // Address and encoding of the last disassembled instruction.