Android Studio include a tool called Image Asset Studio that helsrcou generate your own app icons from material icons, custom images, and text strings. It generates a set of icons at the appropriate resolution for each pixel density that your app supports. Image Asset Studio places the newly generated icons in density-specific folders under the res/ directory in your project. At runtime, Android uses the appropriate resource based on the screen density of the device your app is running on.
Steps to make custom icons are given below
Add image asset
Configure image asset
Set path for example program files
User eg. Office image
Resize accordingly then go for next