Android tools 3.3 & Gradle 4.10.3 update (#642)

Gradle 4.10.1 or higher is needed for Android Studio 3.3.0 ref:
- https://developer.android.com/studio/releases/gradle-plugin#3-3-0

Resolves #634 (Update Gradle classpath for Android Studio 3.3)
Resolves #596 (Support gradle 4.9+)

test/build.gradle

@@ -28,7 +28,7 @@ buildscript {
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
 
-        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.android.tools.build:gradle:3.3.0'
     }
 }
 

test/wrapper.gradle

@@ -1,3 +1,3 @@
 wrapper {
-    gradleVersion = '4.6'
+    gradleVersion = '4.10.3'
 }