android: Show files opened using system picker for recently used

Switch the list of recently used documents in LibreOffice Android
Viewer to show the documents opened using the system file picker
instead of those shown using the custom UI elements for file
selection.
This way, files provided by DocumentsProviders, like Nextcloud,
can also be handled.

As described at [1], this requires persisting permissions
in order to be able to access the files after a device reboot.
The corresponding method to do this,
'ContentResolver#takePersistableUriPermission', is only
available from SDK level 19 on, so drop entries for
older SDK levels (current minSdkVersion is 16).

[1] https://developer.android.com/training/data-storage/shared/documents-files#persist-permissions

Change-Id: Ifbf7148cda687a8a2e3f0c14fe66651509b2f19a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/113459
Tested-by: Jenkins
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>

0 files changed, 0 insertions, 0 deletions