Set UI theme directly in App.onCreate() and not in an asynchronous thread to avoid rare occurrences of IllegalStateException

Dev 3.x espresso experimental ose

See merge request bitfireAT/davx5-ose!59

ical4android: assume 1 day/1 hour for Android events without dtEnd and duration (should not occur, but occurs)

Android 11: fix problems when viewing URLs in some default browsers; vcard4android: don't convert TYPEs into explicit custom labels

Update .gitlab-ci.yml file, added CURL:   - curl -XPOST -d 'email=gitlab%40bitfire.at&password=$DAVTEST_TOKEN&action=Request+access' 'https://davtest.dev001.net/access/'