More explicit guards for attempting to set RTC (#4452)

* Guard against timesources from the mesh if we have good time

* Trunk

* Consider phone time in the past 24 hours authoritative as well

* Rename

* GPS can be null

* Declaration

* Remove RemoteHardware

* Explicitly remove GPS

* Exclude GPS earlier for RAK2560

src/modules/PositionModule.h

@@ -60,6 +60,7 @@ class PositionModule : public ProtobufModule<meshtastic_Position>, private concu
     void trySetRtc(meshtastic_Position p, bool isLocal, bool forceUpdate = false);
     uint32_t precision;
     void sendLostAndFoundText();
+    bool hasQualityTimesource();
 
     const uint32_t minimumTimeThreshold =
         Default::getConfiguredOrDefaultMsScaled(config.position.broadcast_smart_minimum_interval_secs, 30, numOnlineNodes);