Add storage-permission-request

[jkrude]

Current problem

• Wrong permission is checked when importing an image.
• A crash occurs after selecting a picture (instead of using the camera).
• This results in a crash in the nextcloud-android-app too.

Suggested solution

• The suggested changes would check for permission and, if missing, ask for the READ_EXTERNAL_STORAGE permission.
• Similar to the style in AuthentificatiorActivity or PermissionUtil.

Notes

Alternatively the permission-check could happen in the nextloud-android-app too ( in AuthentificatiorActivity), because the same permission is needed anyway later on. However, a user who only wants to use the camera would not know what for.

[tobiasKaminsky]

This was already done by me: blikoon#21

But unfortunately it is not yet merged in upstream :S

[jkrude]

My bad, I should have looked more closely.
Silly question but if it wasn't merged since 2018 and causes an obvious exception in the nextcloud-android-app should it not be considered to skip the original repo?

[tobiasKaminsky]

should it not be considered to skip the original repo?

I assumed that original repo would merge it, as I created a PR there.
Then I forgot.
I will merge it then and include it in NC app.

[tobiasKaminsky]

I think this is done via #5 or?