Update versions for build dependencies

This updates Gradle wrapper and Android Gradle Plugin.

'./gradlew assembleDebug' passes in every project in project.txt (after
'./gradlew preflight' if necessary).

LICENSE was modified in Change-Id:
I0b7143eadf2eb17b1ebf0b58e84286f9f87283d9

Test: './gradlew preflight && assembleDebug' in all projects
Bug: 122916118
Change-Id: I51f02b1fa5740090d8e75850df54053bb0440863
diff --git a/testing/ActivityInstrumentation/README.md b/testing/ActivityInstrumentation/README.md
index 9e49674..e85b717 100644
--- a/testing/ActivityInstrumentation/README.md
+++ b/testing/ActivityInstrumentation/README.md
@@ -8,8 +8,8 @@
 Pre-requisites
 --------------
 
-- Android SDK 24
-- Android Build Tools v24.0.2
+- Android SDK 28
+- Android Build Tools v28.0.3
 - Android Support Repository
 
 Getting Started
@@ -33,7 +33,7 @@
 License
 -------
 
-Copyright 2016 The Android Open Source Project, Inc.
+Copyright 2019 The Android Open Source Project, Inc.
 
 Licensed to the Apache Software Foundation (ASF) under one or more contributor
 license agreements.  See the NOTICE file distributed with this work for