Revert "Adjust how we assign vtable indexes during class loading."

This reverts commit 868e576d4f67026bb7109286f922cb26e0e84145.

Bug: 211854716
Bug: 233545487

Reason for revert: Some inaccuracies in the comments.

Change-Id: Iddfe66c7748ef2f617d06d5dbcb8787a18e22125
2 files changed