Fix multi-image TODOs in class linker, runtime, and oat file.

- Modified SanityCheckArtMethodPointerArray in class linker
- Put back warnings in OatFile::GetOatDexFile
- Reinstated ImageSpace VerifyImageAllocations in Runtime::Init

Bug: 26317072

(cherry-picked from commit 0dfef949bb824accde27f8cfe1b233ec9e087355)

Change-Id: I3bdb8f87d885213795c82c41e5095fec6daf00c4
3 files changed