use unmock to test and fix the channel suffix generation to match device

app/src/test/java/com/geeksville/mesh/model/ChannelSetTest.kt

@@ -0,0 +1,16 @@
+package com.geeksville.mesh.model
+
+import android.net.Uri
+import org.junit.Assert
+import org.junit.Test
+
+class ChannelSetTest {
+    /** make sure we match the python and device code behavior */
+    @Test
+    fun matchPython() {
+        val url = Uri.parse("https://www.meshtastic.org/d/#CgUYAyIBAQ")
+        val cs = ChannelSet(url)
+        Assert.assertEquals("LongSlow", cs.primaryChannel!!.name, )
+        Assert.assertEquals("#LongSlow-V", cs.primaryChannel!!.humanName, )
+    }
+}