Dev build: dismissable missed-dose notification

Test build from the dev branch (937bcdd). Not a stable release.

Swiping the missed-dose notification away now discards those doses, so it stops coming back. A dose missed later still notifies.

Pick the APK matching what's installed. Update over the top, never uninstall.

• dosekeeper-dev-debug-signed.apk: for a phone on a locally built debug install.
• dosekeeper-dev-release-signed.apk: for a phone on the v1.0.0 release.

Android refuses the wrong one and leaves the app and its data untouched.