### To list-up installed app
`pm list packages`

### Search for a particualr app with pacakagename
`pm list pacakges | grep com.abc`

### Turn on Battery Optimization for a particular app
`adb shell dumpsys deviceidle whitelist +<package_name>`

### Turn off Battery Optimization for a particular app
`adb shell dumpsys deviceidle whitelist -<package_name>`

### To start a service
`adb shell am startservice com.some.package.name/.YourServiceSubClassName`

### To start a service
`adb shell am stopservice com.some.package.name/.YourServiceSubClassName`

### Grant Permission for ex WRITE_SECURE_STTINGS
`adb shell pm grant com.abc.yourpackagename android.permission.WRITE_SECURE_SETTINGS`

### Revoke Permission for ex WRITE_SECURE_STTINGS
`adb shell pm revoke com.abc.yourpackagename android.permission.WRITE_SECURE_SETTINGS`

### Enable accessibility 
`adb shell settings put secure enabled_accessibility_services packagname/servicename`