Frameworks/base: Propagate boot status to installd

Propagate the boot status explicitly to installd so that we do not
have to rely on dev.bootcomplete, which isn't meaningfully set
when the device needs the decryption screen on boot.

Bug: 23898216
(cherry picked from commit 06bb908b)
Change-Id: I9b34298caf70b1e5d40970cc0d04c469016a80a7