DC: replace some cmdprocessor calls with roottools calls

allows us to reuse shells, less SU logs, better performance.

also prevent some race conditions at vibrator tuning preferences.
in rare cases, writing takes longer than vibration, causes the device to
use the wrong vibration strength at the haptic feedback.

Change-Id: Ic8d13fae973f8784c0c839231af1033f821d95dc
DC: fix mc power scheduler derp

when copy and pasting the changes, i forgot to rename the file it writes to

Change-Id: I953bcfd76427fee26a13019d3a8c2b560f94befc