[automerger skipped] Clean up keymint ProtectedData documentation am: b8f9efc5 -s ours

am skip reason: Merged-In I28337a80e2b49661cc37876400d7ac3b8759ba01 with SHA-1 1d389ace is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/18078117



Change-Id: I4f58e8edbf30a4b406c059fe9a5f55c75231c391
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>