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+)

bin/templates/project/app/build.gradle

@@ -27,7 +27,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.android.tools.build:gradle:3.3.0'
     }
 }
 
@@ -40,7 +40,7 @@ allprojects {
 }
 
 task wrapper(type: Wrapper) {
-    gradleVersion = '4.6.0'
+    gradleVersion = '4.10.3'
 }
 
 // Configuration properties. Set these via environment variables, build-extras.gradle, or gradle.properties.