Disable Heads Up Notification Oreo with ADB

1.Open ADB
2.Type to get list devices
adb devices
3.Set disable
adb shell settings put global heads_up_notifications_enabled 0
  set enable
  adb shell settings put global heads_up_notifications_enabled 1

ref : https://android.gadgethacks.com/how-to/disable-heads-up-notifications-any-android-no-root-needed-0182247/