init: Set properties to make SafetyNet pass

Google's SafetyNet integrity checks will check the values of these
properties when performing basic attestation. Setting fake values helps
us pass basic SafetyNet with no Magisk Hide or kernel patches necessary.

Note that these properties need to be set very early, before parsing the
kernel command-line, as they are read-only properties that the bootloader
sets using androidboot kernel arguments. The bootloader's real values
cause SafetyNet to fail with an unlocked bootloader and/or custom
software because the verified boot chain is broken in that case.

Change-Id: I66d23fd91d82906b00d5eb020668f01ae83ec31f