DevicePostureControlller to use the device posture of the device display

Instead of using the CONCURRENT device state (multiple displays on the
device are being used), use the base (physical) device state.

Test: atest DevicePostureControllerImplTest
Test: manually set device state `adb shell cmd device_state state 4`,
then check sysui dumpsys, DozeSensors section and see posture is the
current display posture and not UNSUPPORTED/1000.
Fixes: 303543453
Flag: NONE

Change-Id: Id4cff55e197f3dc4c11d9e3bc4a2d0bccdcf516c