I have made some adjustments for you in the designer on Screen1 (verticalScrollArr) and in the blocks:
teste2.aia (4.8 MB)
As I said this app does not need READ/WRITE_EXTERNAL_STORAGE permissions. So build the APK (teste2.apk), open it and deny permission and see that it works anyway. But the Sharing component enforces these permissions (see here: ExoPlayer source only from assets or URI - #17 by bodymindpower). So if you do not want these permissions to be requested you have to remove them from the Manifest before building the APK.
Anke