Revert "Force PLATFORM_SECURITY_PATCH for SafetyNet"

This reverts commit 709f9fff and 87f311f0.

Reason for revert:
- Us forcing an old security patch level, will cause people to be unable to lock their bootloader when coming from a newer rollback index
- It would also break userdata, if we do serve a newer build with an older security patch than what the user is on