manifest: Track specific revision of repohooks

* 17.1/18.1/19.1 all track `master` for this repo.
* 17.1 is the only one of these where soong lacks
  license declaration support, so as of March, 2025
  17.1 builds all fail.
* Roll this repo back two commits, to before the
  license declaration was added.

This means that 17.1 repohooks will be frozen @:

```
commit f485d175b804334112409240d77a9d1821420a95
Merge: ee097dd 9faea55
Author: Mike Frysinger <vapier@google.com>
Date:   Thu Feb 20 09:23:17 2025 -0800

    tools: cpplint: update to 2.0.0 release am: 9faea55166

    Original change: https://android-review.googlesource.com/c/platform/tools/repohooks/+/3499431



    Change-Id: Ie68e5b1d813da2e1e6b660891c7064c799c0bd48
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
```

Reference: I5ae3aedfce2596db7eb4d7d41842d94fd3be21bf
Change-Id: If8caab90c834221192de53e61db9bfb0e7fe6bfc