ART: Mark move constructors with noexcept

As libc++ is pessimized even under -fno-exception, revert our
previous opinion on clang-tidy warnings and add noexcept keywords.

Bug: 117098004
Test: WITH_TIDY=1 mmma art
Change-Id: I4ab3ad1976f6feb6da98d36e62490e31dbe6a6b2
diff --git a/libartbase/base/scoped_arena_allocator.h b/libartbase/base/scoped_arena_allocator.h
index 7eaec5e..52d0361 100644
--- a/libartbase/base/scoped_arena_allocator.h
+++ b/libartbase/base/scoped_arena_allocator.h
@@ -138,7 +138,7 @@
 class ScopedArenaAllocator
     : private DebugStackReference, private DebugStackRefCounter, private ArenaAllocatorStats {
  public:
-  ScopedArenaAllocator(ScopedArenaAllocator&& other);
+  ScopedArenaAllocator(ScopedArenaAllocator&& other) noexcept;
   explicit ScopedArenaAllocator(ArenaStack* arena_stack);
   ~ScopedArenaAllocator();