Add autodoc support for Signature.
There are a few algorithms that used to be known by one name but now are
known by another, but the first name still shows up in our documentation,
so I added handling to continue to support those names.
I also had to do a little bit of sleuthing on when certain algorithms
appeared, because they certainly were before API 26 but our API 25 docs
don't mention them. They may be slightly off in one direction or another.
Bug: 35793879
Test: Ran run_update_crypto_support.sh
Change-Id: Ifc3e6fa3177afd82012d75eaaf7ecb26d750659d
3 files changed