Use std::shared_ptr for DexFileContainer am: 0b9b330c94 am: 25fbafe3f5 am: e02ab77ddf

Original change: https://android-review.googlesource.com/c/platform/art/+/2457488

Change-Id: I662c108ee8568e7598a56273a48423aed8aef5bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>