Merge "Javadoc improvements related to the device policy management role...

Merge "Javadoc improvements related to the device policy management role holder updater" into tm-dev am: c3dbe772

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17044806

Change-Id: I1984ef2a47999e5da9b40df6f95c64014199c378