Revert "Profile compression: Replace method index with difference with the last method_index"

This reverts commit d59f564f9bb9301855a3613912e287c4eba49655.

Reason for revert: git_master-art-host - art-gtest-heap-poisoning is broken with this change.

Change-Id: I5a94be6c4609defcee1c0d374009b16e70310a0d
2 files changed