libsuspend: force autosleep off during init

If autosuspend_autosleep_init is called when autosleep is enabled,
for example after a runtime restart with the screen off, the kernel
autosleep state will be enabled, but autosuspend_enabled is false.
Further calls to autosuspend_disable by the framework will not result
in autosleep being disabled.

Call autosuspend_autosleep_disable from autosuspend_autosleep_init
to get the kernel state into a known state that matches the
autosuspend_enabled flag.

Bug: 7119416
Change-Id: I8611e4fd256838272aad4382c2340508805b0376