[hal] Add method to detect if the CAN Stream has overflowed (#6105)

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

@@ -151,7 +151,8 @@ Java_edu_wpi_first_hal_can_CANJNI_readCANStreamSession
     return 0;
   }
 
-  if (!CheckStatus(env, status)) {
+  if (status != HAL_ERR_CANSessionMux_SessionOverrun &&
+      !CheckStatus(env, status)) {
     return 0;
   }
 
@@ -181,6 +182,12 @@ Java_edu_wpi_first_hal_can_CANJNI_readCANStreamSession
                             reinterpret_cast<jbyte*>(msg->data));
   }
 
+  if (status == HAL_ERR_CANSessionMux_SessionOverrun) {
+    ThrowCANStreamOverflowException(env, messages,
+                                    static_cast<jint>(messagesRead));
+    return 0;
+  }
+
   return static_cast<jint>(messagesRead);
 }