LWIS: use set_output_value_raw() to ignore the active-low

When pull a GPIO pin to high or low, we should consider
active-low property. Use the set_output_value_raw function,
it can ignore the active-low or open drain property of a
GPIO and work on the raw line value.

Bug: 170373591
Test: Flash light, all sensors probed.
Signed-off-by: Holmes Chou <holmeschou@google.com>
Change-Id: Iad53a867b1672184fc630265e299406af56ab3a0