fix: 5102 - fixed the path of the database to backup

[monsieurtanuki]

What

• Just trying to fix F-Droid build failed #5102, but I'm not sure of anything.
• The error seems to be Subdirectories are not allowed for domain database
• Not sure if it means that we should not put subdirectories or if the subdirectory we put is not allowed.
• Having a look at https://developer.android.com/guide/topics/data/autobackup?utm_campaign=autobackup-729&utm_source=dac&utm_medium=blog#IncludingFiles, we see that the domain parameter specifies the (allowed? impliciit?) directories

domain Specifies the location of resource. Valid values for this attribute include the following:

• database: directories returned by getDatabasePath(). Databases created with SQLiteOpenHelper are stored here.

For the record (1) the database folder created by our app is databases/ (as returned getDatabasesPath()).
Does that mean that we should put databases/smoothie.db, or just smoothie.db? Let's try, it's either with or without explicitly mentioning databases/.

For the record (2) the amount of backed-up data is limited to 25 Mb. Which means that we would probably be better off NOT including the sqflite database (which is meant to grow far beyond 25 Mb), so that the rest of the data can be backed up. Then comes the question: how to make sense of lists of barcodes if we don't have locally the matching products?

Fixes bug(s)

• Fixes: F-Droid build failed #5102

[monsieurtanuki]

cc @linsui

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 9.53%. Comparing base (4d9c7fc) to head (520e34d).
Report is 53 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #5103      +/-   ##
==========================================
- Coverage     9.54%   9.53%   -0.02%     
==========================================
  Files          325     327       +2     
  Lines        16411   16529     +118     
==========================================
+ Hits          1567    1576       +9     
- Misses       14844   14953     +109     

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[linsui]

https://gitlab.com/linsui/fdroiddata/-/jobs/6305195522 It works, thanks!

[monsieurtanuki]

https://gitlab.com/linsui/fdroiddata/-/jobs/6305195522 It works, thanks!

@linsui Cool!
cc @teolemon @g123k for PR approval if relevant.

[monsieurtanuki]

Thank you @teolemon @linsui for your review and tests!