Add a new CTS test for DCL read-only enforcement am: d3a8a9e960 am: d073a7265c

Original change: https://android-review.googlesource.com/c/platform/art/+/2299577

Change-Id: I5b6884c26210be51156dfe74feffad4344fe0eb5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>