Add Android instructions to the devguide (GH-1402)

Co-authored-by: Hugo van Kemenade <[email protected]>
Co-authored-by: Adam Turner <[email protected]>

Author: 3 people

getting-started/setup-building.rst

@@ -458,6 +458,12 @@ used in ``python.sh``:
 .. _wasmtime: https://wasmtime.dev
 .. _WebAssembly: https://webassembly.org
 
+Android
+-------
+
+Build and test instructions for Android are maintained in the CPython repository
+at :cpy-file:`Android/README.md`.
+
 iOS
 ---
 
@@ -608,8 +614,8 @@ for details.
 Install dependencies
 ====================
 
-This section explains how to install additional extensions (for example, ``zlib``)
-on Linux, macOS and iOS.
+This section explains how to install libraries which are needed to compile
+some of CPython's modules (for example, ``zlib``).
 
 .. tab:: Linux
 
@@ -775,6 +781,16 @@ on Linux, macOS and iOS.
 
    On Windows, extensions are already included and built automatically.
 
+.. tab:: Android
+
+   The BeeWare project maintains `scripts for building Android dependencies`_,
+   and distributes `pre-compiled binaries`_ for each of them.
+   These binaries are automatically downloaded and used by the CPython
+   build script at :cpy-file:`Android/android.py`.
+
+   .. _scripts for building Android dependencies: https://github.com/beeware/cpython-android-source-deps
+   .. _pre-compiled binaries: https://github.com/beeware/cpython-android-source-deps/releases
+
 .. tab:: iOS
 
    As with CPython itself, the dependencies for CPython must be compiled for