Optimization plan

[wiiznokes]

• filter files in the timestamp function
• use fts for search https://developer.android.com/training/data-storage/room/defining-data?hl=fr
  - https://medium.com/@adarshsharma1904/custom-functions-on-android-sqlite-with-room-e79b53c4c924
  - https://www.sqlite.org/fts3.html#appendix_a
• use a pagging layer for the grid view https://developer.android.com/topic/libraries/architecture/paging/v3-overview?hl=fr#repository
• don't include large files in the room database