* fix: stop stale Android readbacks snapping Steam's brightness slider back during a held stick
* fix: let deploy_fast sign with the release env on macOS and Linux
* fix: honor DROIDDECK_SIGNING_ENV first and cover the env signer in tests
* fix: honor DROIDDECK_SIGNING_ENV first and cover the env signer in tests
* fix: retry held brightness readbacks, use a monotonic hold clock and resolve the signing env path
* fix: resolve the build-tools path before signing changes directory
* fix: pick the newest build-tools numerically and keep the env file from replacing them
* fix: only pick build-tools that have aapt, zipalign and apksigner