Android 14

[gerhardol]

An update of the application targeting Android 14 instead of Android 10, required for Play updates. This involves a lot of changes required for instance due to scooped storage. There are a few fixes as improvements too.

Some special notes:

• Strava segments handling hidden (code should be removed). 3rd party access was removed May 2020.
• Strava upload hidden. Current key has expired and uses rainer-blind website.
• Dropbox login expires after an hour or so. This is likely requiring access/refresh token, could maybe be adjusted in the Dropbox account too.
• TrainingPeaks upload is unchanged (I have no account and the trial is limited to two weeks only).

You may test this by building yourselves, a binary is also available here: https://github.com/gerhardol/aTrainingTracker/releases/tag/vAndroid-14-240731 This identifies as com.atrainingtracker.debug and is installed in parallel to the Play version

Note: This PR should not be squashed, merge commit or rebase to retain the individual commits.