Disable encryption option, as it is broken in FP2/Android 9

Encrypting the FP2 on Android 9 causes data loss in most cases and
sometimes even prevent the phone from booting at all afterwards.

Disable encryption completely for now. Users who want to have encryption
need to go back to Android 7, encrypt and upgrade; for now.

Issue: FP2P-374
Issue: FP2P-497
Change-Id: I98d53012e5e7a231572a6a8a9adcb75a11961406
8 files changed