Disable runtime app image while investigating b/268225365. am: 5917f09d5e

Original change: https://android-review.googlesource.com/c/platform/art/+/2422712

Change-Id: Ie31bfe586afb0040d4cc7a7938e9e0b21fea625a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>