* Use MediaStore on newer Android Q or newer
* Use flow instead of Observable
* Review comment fixes
* Use suspended function instead of flow
(cherry picked from commit 1163aa4e4ecfe6f430e7f7c8323c0f64c73d7dbd)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/AppModule.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt