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

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

Change-Id: Ib9f7c664ccd6611c437e27b7b630639293bcd78d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>