Gate all bootloader override logic behind bootctl_supported=1.

Fixes potential deadlock during boot on fullmte devices.

Bug: 311331983
Test: in a fullmte build
      setprop persist.device_config.runtime_native_boot.bootloader_override force_on
      reboot
Change-Id: I5a4e13bb5d99373fc05a542b49557b0102b70df2
1 file changed