[3.14] gh-146541: Allow building the Android testbed for 32-bit targets (GH-146542) (#148064)

Allows building the Android testbed for 32-bit targets, adding the target triplets
`arm-linux-androideabi` and `i686-linux-android`.
(cherry picked from commit 848bbe9ff21ae0a3ee412cc25843835ace4f75df)

Co-authored-by: Robert Kirkman <31490854+robertkirkman@users.noreply.github.com>
Co-authored-by: Malcolm Smith <smith@chaquo.com>