Add option to control hosts sources like in AdAway

Add option to control hosts sources like in AdAway or at least for now tell from which sources your hosts file is made and how often it updates.

No files or tests are named in the issue. Start by locating where the Android/Xposed module builds and updates the hosts file, then find the settings or UI entry point for exposing source information. Done means users can control hosts sources like AdAway, or at minimum see which sources were used and how often they update.

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