chore: polish contribution guidelines

Author: msfjarvis

CONTRIBUTING.md

@@ -26,11 +26,9 @@ The source code is split across 12 modules and 1 subproject.
 - `crypto/common` is the foundation of our new, extensible cryptography APIs that adds the ability to introduce new cryptographic backends to APS with minimal effort.
 - `crypto/pgpainless` is the first of our new backends that implements the APIs defined in `crypto-common` to offer PGP cryptography through the [PGPainless](https://gh.pgpainless.org/) library.
 - `format/common` handles parsing the `pass` file format.
-- `openpgp-ktx` contains the now defunct glue code that was used by APS to interact with OpenKeychain.
 - `passgen/diceware` is our new password generator that implements the [Diceware](https://theworld.com/~reinhold/diceware.html) algorithm.
 - `passgen/random` contains the default password generator.
 - `sentry-stub` contains no-op variants of [Sentry](https://sentry.io/) APIs that we use to ensure the FOSS-only, telemetry-free variant of APS continues to compile in absence of Sentry dependencies.
-- `ssh` has exactly what you think it does.
 - `ui/compose` has the theming code for building UI components in [Jetpack Compose](https://developer.android.com/jetpack/compose).
 - `app` is everything else that constitutes APS.
 
@@ -47,7 +45,7 @@ We bundle a [`ignore-revs-file`](https://git-scm.com/docs/git-blame#Documentatio
 
 ### Building with Gradle
 
-This document assumes that you already have an Android development environment ready. If not, refer to Google's documentation on [installing Android Studio](https://developer.android.com/studio/preview). APS currently uses a pre-release version of Android Studio but will eventually return to the stable version.
+This document assumes that you already have an Android development environment ready. If not, refer to Google's documentation on [installing Android Studio](https://developer.android.com/studio/preview). APS will build with all editions of Android Studio, but development typically happens with the Canary channel.
 
 The app comes in two 'flavors', a FOSS-only **free** variant and a **nonFree** variant that contains proprietary Google dependencies to facilitate some additional features as documented [here](https://android-password-store.github.io/docs/users/build-types). Decide what flavor you want to build, then run the following command to generate a debug APK.