Merge "Add maxTargetSdk restriction to unused APIs." am: db3bb00d7b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1468245

Change-Id: I35f65987f7f9287cf03418e9feb27c81f4fd1878
tree: d58b5386c196358b6d5b04219a11dcfb59fcc92d
  1. core/
  2. services/
  3. wifi/