Add lineageblocker service to service_contexts
Description
This MR is intended to add service context related to lineageblocker which is a part of lineage-sdk.
Issue(s)
https://gitlab.e.foundation/e/backlog/-/issues/3249
https://gitlab.e.foundation/e/backlog/-/issues/3251
Test environment
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Create a build with a feature branch name set to blocker-service-q.
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Download the latest apk artifact from the PrivacyCentral repo and follow the instructions about installation in README. 
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Root your device using Magisk or any other root software. 
Test procedures
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Open the PrivacyCentral App, go into trackers, try to toggle any tracker, for example, Facebook ads. 
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Now try to open the facebook.com in the browser, it should not be accessibe. 
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If you get the SELinux exception in logs, please make SELinux permissive with the command -> adb shell setenforce 0.
Technical details
Screenshots
Check list
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Self review 
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Test procedure explained 
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Tested on fresh install 
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Tested applied as an update 
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License 
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Internal documentation 
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User documentation