Move libboot_control to boot_control 1.1

It should belong to the default /misc implementation of boot control
1.1. Right now, it's only used by cuttlefish. So move it over to reduce
confusion in bootloader_message.

Bug: 131775112
Test: build
Change-Id: If09bc6f4cc8adf74c8798048c8e54ec94566abaa
(cherry picked from commit dc4d2a70)