Calculate StatusBar height locally in Launcher

When reading the status bar inset on devices with
multiple displays after switching the displays
the inset is not updated immediately (SystemUI
should update the height of the window first by
reacting to the display switch in it's own process).

Due to this race condition Launcher is very likely
to calculate DeviceProfile with incorrect inset
of the previous display first and update it to
the correct one only after SystemUI finished the
window update.

To avoid this adding calculation of the StatusBar
height to Launcher locally using the same utility
method that is used by SystemUI.

Bug: 264656380
Test: manual test that the statusbar height is calculated
 correctly in Launcher on a device with two displays, both on
 the inner and outer display and different rotations
Change-Id: Ia16ecadd8fcac29082d27ca693ab7740ce6161c4