[android] Android Studio Image Asset Launcher Icon Background Color

First, create a launcher icon (Adaptive and Legacy) from Image Asset:

Select an image for background layer and resize it to 0% or 1% and In legacy tab set shape to none.

Then, delete folder res/mipmap/ic_laucher_round in the project window and Open AndroidManifest.xml and remove attribute android:roundIcon="@mipmap/ic_launcher_round" from the application element.

In the end, delete ic_launcher.xml from mipmap-anydpi-v26.

Notice that: Some devices like Nexus 5X (Android 8.1) adding a white background automatically and can't do anything.