[3.5.0 RC1] No app available for sending email

[j-ed]

Actual behavior

If you select Settings -> Feedback the message "No app available for sending email!" (Keine App verfügbar für den E-Mailversand!) is displayed although multiple apps to send email are installed on the phone, e.g. "K-9".

Expected behavior

An email application should be opened.

Steps to reproduce

1. Open the Nextcloud app and select the Settings tab.
2. Select the "Feeback" function.
   -> A "No app available for sending email" message is displayed.

Environment data

Android version: 8.0
Device model: Samsung Galaxy S7
Stock or customized system: Stock ROM
Nextcloud app version: 3.5.0 RC1
Nextcloud server version: 15.0.2

[AndyScherzinger]

Thank @j-ed for the bug report. I created a fix @ #3532