FP4: Set BOOT_SECURITY_PATCH

Description

FP4: Set BOOT_SECURITY_PATCH

Issue(s)

https://gitlab.e.foundation/e/devices/backlog/-/issues/930

Test procedures

Scenario 1

• Install 1.18-t-dev
• Sideload /dev build built against this branch
• Device boots normally after upgrade

Scenario 2

• Install 1.19-s-stable
• Sideload /stable build built against this branch
• Device boots normally after upgrade

Scenario 3

• Install 1.20-t-beta && Lock Bootloader
• Sideload /stable build built against this branch
• Device boots normally after upgrade

Technical details

• Set this to unbreak upgrade path for users on /dev t based off LineageOS trees to our forked tree.

Screenshots

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation