[automerger skipped] RESTRICT AUTOMERGE Refactor device policy resource APIs to a separate class am: b7aedc6f am: f62a7e64 -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17182686

Change-Id: I45e90914862024b9a56e1ec7096bf2350569c8f1