Develop Android 7.1 package which can be used as Required Verifier for all packages before they are allowed to be installed into my custom ROM. No verification logic needs to be implemented here, just develop the application skeleton, integrate it with Android Package Manager internals and demonstrate (by logging) it can intercept all further packages installation.
Some technical details about verifiers:
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Hi.
I have read your project description and have interesting for your job.
I can implement app based on Android 7.1 device as you want.
Looking forward to work with you.
Thank you.