Upgrade the Development app to 1.8, and use a lambda.

Change-Id: Ifa3836a3c5fc36a1932ea0d841e412ef238fb4bb
diff --git a/apps/Development/Android.mk b/apps/Development/Android.mk
index 9dd2e1a..560f582 100644
--- a/apps/Development/Android.mk
+++ b/apps/Development/Android.mk
@@ -11,4 +11,6 @@
 LOCAL_PACKAGE_NAME := Development
 LOCAL_CERTIFICATE := platform
 
+LOCAL_JAVA_LANGUAGE_VERSION := 1.8
+
 include $(BUILD_PACKAGE)
diff --git a/apps/Development/src/com/android/development/Connectivity.java b/apps/Development/src/com/android/development/Connectivity.java
index 53df614..c454db6 100644
--- a/apps/Development/src/com/android/development/Connectivity.java
+++ b/apps/Development/src/com/android/development/Connectivity.java
@@ -334,16 +334,7 @@
                     public void onAvailable(Network network) {
                         mNetwork = network;
                         onHttpRequestResults(null);
-// TODO: replace with:
-//                      runOnUiThread(() -> {
-//                            findViewById(mProgressBar).setVisibility(View.GONE);
-//                      });
-                        runOnUiThread(new Runnable() {
-                            @Override
-                            public void run() {
-                                findViewById(mProgressBar).setVisibility(View.GONE);
-                            }
-                        });
+                        runOnUiThread(() -> findViewById(mProgressBar).setVisibility(View.GONE));
                     }
                     @Override
                     public void onLost(Network network) {