[wpilib] Add timestamp getters with configurable time base (#7378)

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/differentialdriveposeestimator/Drivetrain.java

@@ -245,7 +245,7 @@ public class Drivetrain {
 
     // Apply vision measurements. For simulation purposes only, we don't input a latency delay -- on
     // a real robot, this must be calculated based either on known latency or timestamps.
-    m_poseEstimator.addVisionMeasurement(visionMeasurement2d, Timer.getFPGATimestamp());
+    m_poseEstimator.addVisionMeasurement(visionMeasurement2d, Timer.getTimestamp());
   }
 
   /** This function is called periodically during simulation. */

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/mecanumdriveposeestimator/Drivetrain.java

@@ -167,6 +167,6 @@ public class Drivetrain {
     m_poseEstimator.addVisionMeasurement(
         ExampleGlobalMeasurementSensor.getEstimatedGlobalPose(
             m_poseEstimator.getEstimatedPosition()),
-        Timer.getFPGATimestamp() - 0.3);
+        Timer.getTimestamp() - 0.3);
   }
 }

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/swervedriveposeestimator/Drivetrain.java

@@ -99,6 +99,6 @@ public class Drivetrain {
     m_poseEstimator.addVisionMeasurement(
         ExampleGlobalMeasurementSensor.getEstimatedGlobalPose(
             m_poseEstimator.getEstimatedPosition()),
-        Timer.getFPGATimestamp() - 0.3);
+        Timer.getTimestamp() - 0.3);
   }
 }