Don't limit file types by system

[Kyant0]

System usually can't detect some audio or video types, such as the .alac and .mpc files, and FFMpeg can play with alac encoded files.

[Javernaut]

The original idea was to leverage the filtration made by the system. In recent version of Andriod OS it even shows a bottom sheet for video files.
Indeed it filters out some formats. I'll see what I can do to mitigate this.