Revert "Revert "Implement DocumentsProvider.createDocument and deleteDocument""

This reverts commit 7b48fad82ce59bb0c4dfda8aa9a5ce20e035ba8c.
Revert "Implement DocumentsProvider.createDocument and deleteDocument"

This reverts commit f6bfaee6ad7ccd4491609d5df606558a4ae30f72.
Revert "Fix DocumentsUI FC"

This reverts commit efebea25670cf603014c79edb553f4604dad8ee7.
Revert "DocumentsUI: Handle NPE gracefully"

This reverts commit 3bf634c35119fa2bb5536fb784ec343feb312192.
Revert "DocumentsUI: Remove catch-all statements"

This reverts commit 3982cd1225486a97866af69a2fb6ca0ef5db6a7f.
Revert "Fix crash when clicking a file from recents or downloads"

This reverts commit c1f7537add22d4a551067ab73853025f548dcc3f.
Revert "DocumentsUI: Allow open files instead of URIs"

This reverts commit d679137259a4b8e8b43ea094ab6193fb87ae6000.
Revert "DocumentsUI translations"

This reverts commit ddf33a9a00e4a1c66833954ed1a4de1e391835f1.
Revert "DocumentsUI: Add a standalone File Manager"

This reverts commit f3ae5ff02dab4d913d3063239b6f13a9a4e578f6.