Merge "Update write permission in MultiUser test apk." into sc-dev am: 75599c9e am: 28c4bc41 am: e455f749

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15159275

Change-Id: I5521d356cf7c3116a9f0c60f1133c8812c12d0fe