[XVAL] Implement unregister AP data listener and onAccuracyChanged

Bug: 146052784
Test: Build
Change-Id: Ib12598bdb708c81298c0a0d2a7c2841a805fafb3
diff --git a/java/test/utils/src/com/google/android/utils/chre/ChreCrossValidatorSensor.java b/java/test/utils/src/com/google/android/utils/chre/ChreCrossValidatorSensor.java
index 69e4348..4cfa4c5 100644
--- a/java/test/utils/src/com/google/android/utils/chre/ChreCrossValidatorSensor.java
+++ b/java/test/utils/src/com/google/android/utils/chre/ChreCrossValidatorSensor.java
@@ -153,7 +153,7 @@
 
   @Override
   protected void unregisterApDataListener() {
-    // TODO: Implement
+    mSensorManager.unregisterListener(this);
   }
 
   @Override
@@ -169,9 +169,7 @@
   }
 
   @Override
-  public void onAccuracyChanged(Sensor accel, int accuracy) {
-    // TODO: Implement
-  }
+  public void onAccuracyChanged(Sensor sensor, int accuracy) {}
 
   /*
    * @param sensorType The sensor type that was passed to the ctor that will be validated.