Revert "Don't embed the dex code in the oat file if dex is uncompressed."

This reverts commit ae7e8381.

Reason for revert: Broken wrt/ preopted apps and stripping

Bug: 63920015
Bug: 70777774
Change-Id: I39580684d46fa57bd780d2d8bedd65a47d58cf5e
Test: m