Merge "devicepolicy: use typed List<String> in AIDL" into sc-dev-plus-aosp am: 233890d702 am: b8838ca0e6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15623884

Change-Id: I7bc322c173765c63d967236f831901527cde90fc