ART: Change hash table load factors in images to 0.6. am: 00befc6d81

Original change: https://android-review.googlesource.com/c/platform/art/+/2223917

Change-Id: Ide1c5c79480d4490cebe5c0dbbdcd7b3c6447619
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>