ART: Weaken dex file verifier abstract check

We decided to not reject dex files with non-abstract classes containing
abstract methods (even though that's broken code). Just log a warning
instead.

Reported by Nikolay Serdjuk.

Bug: 26143249
Change-Id: Iaf981dba70c7c4b9c844ad9f2806278072e3ed52
4 files changed