Disable Selfsupport and Unified Telemetry in ESR 45

Selfsupport already landed in ESR 38 but was disabled there, I guess due to disabling the health report (see: https://bugzilla.mozilla.org/show_bug.cgi?id=1111022 for the background). This is not the case anymore with an ESR45-based Tor Browser for some reason. We should make sure it is disabled there, too.

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