Your emulator is out of date, please update by launching Android Studio

Your emulator is out of date, please update by launching Android Studio

I sometimes run Android emulator from the command line, like:

c:\>emulator -avd Pixel_2_API_30

Most of the time I would see the following on the console output

WARNING | unexpected system image feature string, emulator might not function correctly, please try updating the emulator.
INFO    | added library vulkan-1.dll
INFO    | configAndStartRenderer: setting vsync to 60 hz
ERROR   | Failed to open /qemu.conf, err: 2
HAX is working and emulator runs in fast virt mode.
INFO    | Started GRPC server at 127.0.0.1:8554, security: Local
INFO    | Advertising in: C:\Users\u1\AppData\Local\Temp\avd\running\pid_14608.ini
INFO    | Your emulator is out of date, please update by launching Android Studio:
 - Start Android Studio
 - Select menu "Tools > Android > SDK Manager"
 - Click "SDK Tools" tab
 - Check "Android Emulator" checkbox
 - Click "OK"

INFO    | boot completed
INFO    | Increasing screen off timeout, logcat buffer size to 2M.
INFO    | Revoking microphone permissions for Google App.

To fix it, open Android Studio then do Tools | SDK Manager. Ensure that "Android SDK Build-Tools" is the latest.