RSDK-5936: change return type for get readings

[purplenicole730]

The return type for the get_readings() calls should be of Mapping[str, viam.utils.ValueTypes] rather than Mapping[str, Any].

Tested with a fake movement sensor and power sensor.

fakeMovementSensor get_readings return value:
{'linear_acceleration': x: 2.2
y: 4.5
z: 2
, 'angular_velocity': z: 1
, 'compass': 25.0, 'position': latitude: 40.7
longitude: -73.98
, 'linear_velocity': y: 5.4
, 'orientation': {'r': 1.0, 'i': 0.0, '_type': 'quat', 'k': 0.0, 'j': 0.0}, 'altitude': 50.5}
fake get_readings return value:
{'volts': 1.5, 'watts': 9.8, 'is_ac': True, 'amps': 2.2}

[github-actions]

Warning your change may break code samples. If your change modifies any of the following functions please contact @viamrobotics/fleet-management. Thanks!

component	function
base	is_moving
board	gpio_pin_by_name
camera	get_image
encoder	get_position
motor	is_moving
sensor	get_readings
servo	get_position
arm	get_end_position
gantry	get_lengths
gripper	is_moving
movement_sensor	get_linear_acceleration
input_controller	get_controls
audio	get_properties
pose_tracker	get_poses
power_sensor	get_power
motion	get_pose
vision	get_classifications_from_camera

[martha-johnston]

lgtm assuming you have tested with a real (or fake) sensor not just the python tests. just want to make sure changing the type didn't mess up something somewhere else

[njooma]

Good catch