Android app developing

I have an apk file which is simply a keyboard. I want to run this keyboard on Amazon firestick. The only way it works by sending shell commands to the amazon firestick. I want to wrap these shell commands to the apk file, so once I install the apk, the shell commands run automatically as soon as the apk file gets installed.

First command : adb shell ime enable org.liskovsoft.androidtv.rukeyboard/com.google.leanback.ime.LeanbackImeService

Second command: adb shell ime set org.liskovsoft.androidtv.rukeyboard/com.google.leanback.ime.LeanbackImeService

And if I want to activate by phone, I use adb shell application and I just run the commands without the (adb shell) word at the beginning

But I want to insert them into the apk so they run automatically after tha apk get installed

Or

Boot these commands at the start of any android device.