Add fastlane data for f-droid.

fastlane/metadata/android/en-US/full_description.txt

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+Secure, End-to-End encrypted and journalized personal information
+synchronization for Android. Currently only contacts and calendars, with more on
+the way.
+
+In order to use this application you need to have an account with EteSync. Check
+out https://www.etesync.com/ for more information. The server code is available
+at https://github.com/etesync/journal-manager
+
+Easy to Use
+===========
+EteSync is very easy to use. It seamlessly integrates with
+Android so you won't even notice you are using it. Security doesn't always have
+to come at a cost.
+
+Secure & Open
+============
+Thanks to End-to-End encryption, not even we can see your data. Don't believe
+us? You shouldn't, just verify yourself, the client is open source.
+
+
+Full History
+=========
+A full history of your data is saved in a secure and integrity-checked journal
+which means you can review, replay and revert any changes made to it at any
+point in time.

fastlane/metadata/android/en-US/short_description.txt

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+End-to-end encrypted and journaled calendar and contacts cloud sync adapter

fastlane/metadata/android/en-US/title.txt

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+EteSync - Secure Cloud Sync