What the difference between installing flutter from Android Studio vs the one from flutter -

If I install the flutter from Android Studio than does that mean I don't have to install the one from flutter -

Using Flutter ver 3.7.10 and Android Studio Electric Eel 2022.1 patch1

When I run the flutter program (See below) under Android Studio I get the

error msg - /D:/Flutter/flutter_windows_3.7.10-stable/flutter/packages/flutter/lib/src/material/animated_icons.dart:9:8: Error: Dart library 'dart:ui' is not available on this platform.
import 'dart:ui' as ui show Canvas, Paint, Path;

However if I run it under DOS Command line it works fine using Nexus7 emulator. Once I do that than I run Android Studio and use that same emulator Nexus 7 it works correctly. Why does the emulator work correctly for Android Studio only after I use that emulator in DOS Command line?

I put the flutter program and screenshots of the emulator from cmd line and the Android Studio ones(One that passed and the one that failed).

Device Manager in Android Studio Eel version is grayed out. Flutter project was from Android Studio Dolphin. I don't see any errors in Flutter. See screenshots of all my dart files and android Studio Eel notice device manager and play button  is grayed out.

main.dart - No issue see screenshot.

second.dart - No issue see screenshot

third.dart - No issue see screenshot

bt1.dart - No issue see screenshot

Android Studio Eel version both device manager and play button is grayed out. See screenshot

Using -