Location Indicator Whitelist

This LSPosed module is supposed to prevent selected packages from spamming the annoying location notification dot.

Some apps do access the location in background for legitimate reasons, and the user may not want to be interrupted because of that.
Some location providers packages aren't whitelisted by ROMs.
The "Status bar location indicator" switch in developer options has a lot of drawbacks:
- It disables all notifications when the user might actually find the notification dot useful
- It doesn't survive a reboot, meaning that you consistently have to switch it off
- It's buggy: if you disable it at the wrong moment, you may get the notification dot stuck on your screen until you reboot. On LOS20, it seems that it even doesn't prevent the location notification dot from showing at all.

Currently only tested on OnePlus 8 (instantnoodle) running LineageOS 20. Please note that I do not plan on adding support for all ROMs and devices, and I might not even read or respond to issues requesting new supports. However, I'll gladly review PRs adding support for new ROMs or devices.
The current hook is very weak and dirty. I would have preferred hooking into the core framework directly, but none of my attempts were successful. I had to hook into SystemUI instead. If you find a way to hook into android framework directly, please let me know. Here's a sneak peek of my unsuccessful hook attempts:
- android.permission.PermissionUsageHelper => shouldShowLocationIndicator
- android.provider.DeviceConfig => get/setBoolean("location_indicators_enabled")
- android.permission.PermissionManager => getIndicatorExemptedPackages
- Patching resource config_locationExtraPackageNames
- Systemizing whitelisted apps
- com.android.systemui.statusbar.phone.PhoneStatusBarPolicy => onLocationActiveChanged
- a combination of all those
UI is clunky but simple and straight to the point. It lacks a search feature though.