Merge "inputflinger: add missing <functional> include" into main

#ifndef _UI_INPUT_BLOCKING_QUEUE_H

#define _UI_INPUT_BLOCKING_QUEUE_H

#include "android-base/thread_annotations.h"

#include <condition_variable>

#include <functional>

#include <mutex>

#include <vector>

#include "android-base/thread_annotations.h"

namespace android {