Use a different name for the product classloader namespace. am: c55265c083 am: a9e0172647 am: 025953d771

Original change: https://android-review.googlesource.com/c/platform/art/+/2166783

Change-Id: Ib2f28d118b7d4862b7889ffe88cd6062c381fe92
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>