copy apk from device:
https://stackoverflow.com/questions/4032960/how-do-i-get-an-apk-file-from-an-android-device
# to obtain apk path
adb shell pm list packages
adb shell pm path com.example.someapp
# or just
adb shell list pacakges -f
# pull to PC
adb pull /path/to/app
# or
adb shell cp /path/to/app /sdcard/myapp.apk
adb pull /sdcard/myapp.apk
get launcheable activity:
aapt dump badging /path/to/apk
# or
adb shell dumpsys package com.excample.packagename
