Jami does not register to receive push notifications

Bug report form

Describe your environment

Please specify the following:

• Ring version: 20200710-01
• Device model: LineageOS 14.1
• Android version: 7.1.2
• What build you are using: F-droid

Steps to reproduce

• Can you reproduce the bug: at will
• Steps:
  1. Install all microG packages (Services Core version 0.2.11.202414).
  2. Add a Google account (required for push notification) and enable options for push notification in microG.
  3. Install Jami.
  4. Restore a Jami account.
  5. Make sure DHT proxy is enabled.
  6. Use Jami for a few days.
• Actual result: Jami does not register to receive push notifications so it doesn't appear in the registered application list in microG while other applications do.
• Expected result: Jami registers to receive push notifications so it appears in the registered application list in microG.

Additional information

This could be the same issue as #768 (closed)

The push notification registered application list looks like below (it's a screenshot of an old microG version):