Hops Away implementation (#966)

* Initial Hops Away feature

* Generate our own hopsAway, comparing hopStart to hopLimit

* Remove import of hopsAway from device nodeInfo, as this only shows 0 when hopStart isn't included on packets (with this info, we can't differentiate between a node which is Hops Away but on old firmware, or nodes which are on new firmware but direct. Both are 0)

Check if hopStart is 0 but hopLimit is not 0, if true set hopsAway to -1.

Show nodes with hopsAway with -1 with a (!) appended to the RSSI details, to show this probably isn't true. (eg they are using old firmware)

Change the default of hopsAway to -1, until we know it is direct (0) or hops away (1+)

* tidy up: move from nested if else to when

* Revert Project_Default.xml

* Move hopsAway when block in to updateNodeInfo() block above it.

Move hopsAway var to end of NodeInfo Class.

Schema update due to change above.

* hopsAway now follows firmware implementation.
hopsAway now imported from radio (installNodeInfo)

* reformat

---------

Co-authored-by: andrekir <andrekir@pm.me>

app/src/main/java/com/geeksville/mesh/ui/preview/PreviewParameterProviders.kt

@@ -35,7 +35,8 @@ class NodeInfoPreviewParameterProvider: PreviewParameterProvider<NodeInfo> {
             shortName = "MM",
             id = "mickeyMouseId",
             hwModel = MeshProtos.HardwareModel.TBEAM
-        )
+        ),
+        hopsAway = 0
     )
 
     private val minnieMouse = mickeyMouse.copy(
@@ -48,7 +49,8 @@ class NodeInfoPreviewParameterProvider: PreviewParameterProvider<NodeInfo> {
         ),
         snr = 12.5F,
         rssi = -42,
-        position = null
+        position = null,
+        hopsAway = 1
     )
 
     private val donaldDuck = NodeInfo(
@@ -81,7 +83,8 @@ class NodeInfoPreviewParameterProvider: PreviewParameterProvider<NodeInfo> {
             gasResistance = 0.0F,
             voltage = 3.7F,
             current = 0.0F
-        )
+        ),
+        hopsAway = 2
     )
 
     private val unknown = donaldDuck.copy(