package identifier or launch activity not found. Please check E:\udemy_flutter\android\app\src\main\AndroidManifest.xml for errors. No application found for TargetPlatform.android_x86. Is your project missing an android\app\src\main\AndroidManifest.xml? Consider running "flutter create ." to create one.
Check android/app/main/AndroidManifest.xml the root tag (manifest) should contain the attribute package as follows:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.flutterdemo">
(this is an example, substitute "com.example.flutterdemo" with your package name)

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