Refactor Class::FixupNativePointers().

Simplify Class::FixupNativePointers() and fix verify flags
usage. Also clean up verify flags for a few array functions.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 77856493
Change-Id: I5370757827a2a5061b956034434bdc63164eda3f
7 files changed