[battor agent] Fix the init sequence so it retries inits instead of resets.

tools/battor_agent/battor_connection_impl.cc

Index: tools/battor_agent/battor_connection_impl.cc
diff --git a/tools/battor_agent/battor_connection_impl.cc b/tools/battor_agent/battor_connection_impl.cc
index cc113a982906f354db84011fe34451bed2c0327e..cf33c2ab97b18e1359f077f192117aae2840b6b5 100644
--- a/tools/battor_agent/battor_connection_impl.cc
+++ b/tools/battor_agent/battor_connection_impl.cc
@@ -181,6 +181,10 @@ void BattOrConnectionImpl::ReadMessage(BattOrMessageType type) {
   BeginReadBytes(message_max_bytes - already_read_buffer_.size());
 }
 
+void BattOrConnectionImpl::CancelReadMessage() {
+  io_handler_->CancelRead(device::serial::ReceiveError::TIMEOUT);
+}
+
 void BattOrConnectionImpl::Flush() {
   io_handler_->Flush();
   already_read_buffer_.clear();