i2c: bma250: gyro wake: set last sleep time, when m7-display calls gyroscope_enable(0)

when screen is going sleeping, this way,
Flick2Wake won't happen after a power button
or touchscreen sleep event either.
i2c: bma250: gyro wake: fixing being disabled by apps when f2s

We should keep the sensor on, even when apps try to disable it
like camera exiting when Auto Orientation is off in framework.
i2c: bma250: gyro wake: fixing gyro disabled when shouldn't be by mipi off

Let the framework/power off decide about disabling it.
Otherwise some functionality is broken, when only the Mipi panel is off
and not the whole phone sleeps, like when in a call. In call framework
is using not only the proxy sensor but the gyro too to decide if phone
was taken from the ear.