Annotate some TODOs

There are two tags that cannot be currently removed but should be
removed in KeyMint V2. Mark them as deprecated and point to the bug
for deletion.

Bug: 183737811
Test: That it compiles.
Change-Id: I98b96cc8c49eb339a998d0abed9216aa57f6b19f
Merged-In: I80ccaedeb777fdb249a8cb021db6628da32d6029