ART: Fix DexFileVerifier try_items OoO validation

DexFileVerifier::CheckIntraCodeItem() implements an out of order
validation for CodeItem try_items.  try_items_size is validated for
sanity via CheckListSize() at dex_file_verifier.cc:800, although
handlers_size ULEB128 read (offset calculated from tries_size_) occurs
before at lines 797-798.

An out of bounds (wild) read will occur for invalid try_items_size at
parsed DEX file.

handlers_size read has been moved after try_items validation to resolve
this OoO issue.

Bug: 21307613
Bug: https://code.google.com/p/android/issues/detail?id=178592
Change-Id: I94d00819ee9a465f57ba9a1fdfdd356979e35ed7