floss: Do not allow hid wakeup when tablet mode is enabled

The power manager policy prevents wakeup from tablet mode by bluetooth
hid devices. Add the dbus call to receive updates from powerd and change
suspend type according to the tablet mode.

Bug: 286575709
Test: powerd_dbus_suspend in tablet mode
Test: mma -j32

Change-Id: Iaf1e5a8a6f7b9f9eb9ab3feec6ed4773ebc4e0a8