Add deprecation explanation for GRANT_PROFILE_OWNER_DEVICE_IDS_ACCESS

Change ag/9734752 deprecated `GRANT_PROFILE_OWNER_DEVICE_IDS_ACCESS`
but did not explain why, instead it ended up using `@hide` as the
explanation. A follow-up change will remove the `@hide` from the
comment and that will break the javadoc generation.

This change adds the missing explanation.

Flag: EXEMPT build refactoring
Bug: 444151586
Test: m offline-system-sdk-referenceonly-docs
Change-Id: I98bd0f39d034cc9eb0eae473e7f67d2fa7ba7c8b