The default Android SDK installed with Android Studio already has the adb application installed and it is the latest.
The error ADB Binary found at /home/user/ adb is obsolete and has serious performance problems with Android Emulator appears only if from Android Studio, menu option, Tools -> SDK Manager -> SDK Tools, the Android SDK Command-line Tools (latest) are installed which conflict with the one install with the Android SDK.
To fix this problem, after unchecking and uninstall of Android SDK Command-line Tools (latest), the above error did not appear.
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