Merge branch '1180-tor-plugin-status' into 'master'

Don't reset Tor connectivity state unless we lose connectivity

Closes #1180

See merge request akwizgran/briar!756

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

@@ -778,7 +778,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 
 		private synchronized void enableNetwork(boolean enable) {
 			networkEnabled = enable;
-			circuitBuilt = false;
+			if (!enable) circuitBuilt = false;
 		}
 
 		private synchronized boolean isConnected() {