use correct ids in test data

app/src/main/java/com/geeksville/mesh/model/MessagesState.kt

@@ -13,11 +13,11 @@ data class TextMessage(val from: String, val text: String, val date: Date = Date
 object MessagesState : Logging {
     val testTexts = listOf(
         TextMessage(
-            "+16508675310",
+            "+16508765310",
             "I found the cache"
         ),
         TextMessage(
-            "+16508675311",
+            "+16508765311",
             "Help! I've fallen and I can't get up."
         )
     )

app/src/main/java/com/geeksville/mesh/model/NodeDB.kt

@@ -45,4 +45,6 @@ object NodeDB {
 
     /// A map from nodeid to to nodeinfo
     val nodes = mutableStateOf(testNodes.map { it.user!!.id to it }.toMap())
+
+    val ourNodeInfo get() = nodes.value[myId.value!!] ?: error("our node not found")
 }