[hal] Add GetTeamNumber (#5596)

hal/src/main/native/cpp/jni/HALUtil.cpp

@@ -484,6 +484,18 @@ Java_edu_wpi_first_hal_HALUtil_getComments
   return MakeJString(env, std::string_view(comments, len));
 }
 
+/*
+ * Class:     edu_wpi_first_hal_HALUtil
+ * Method:    getTeamNumber
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL
+Java_edu_wpi_first_hal_HALUtil_getTeamNumber
+  (JNIEnv* env, jclass)
+{
+  return HAL_GetTeamNumber();
+}
+
 /*
  * Class:     edu_wpi_first_hal_HALUtil
  * Method:    getFPGATime