Encrypt all notifications on the keyserver for Android devices

Summary: This differential enables collapsible notifications encryption for Android devices which code version supports this feature.

Test Plan:

1. Build Android app.
2. Send collapsible notifications.
3. Ensure that they are correctly collapsed.
4. Open MariaDB shell and execute select * from olm_sessions;. Ensure that the version of the last session is not incrementing with each collapsible notification.
5. Go to version-utils.js and change FUTURE_CODE_VERSION to 0.
6. Repeate 2 and 3.
7. Open MariaDB shell and execute select * from olm_sessions;. Ensure that the version of the last session is incrementing with each collapsible notification.

Reviewers: tomek, bartek, atul

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D9199