Add test app

test_app/buildozer.spec

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+[app]
+
+title = Test App
+package.name = testapp
+package.domain = org.test
+
+source.dir = .
+source.include_exts = py,png,jpg,kv,atlas
+
+version = 0.1
+requirements = python3,kivy
+
+orientation = portrait
+fullscreen = 0
+android.arch = armeabi-v7a
+
+# iOS specific
+ios.kivy_ios_url = https://github.com/kivy/kivy-ios
+ios.kivy_ios_branch = master
+ios.ios_deploy_url = https://github.com/phonegap/ios-deploy
+ios.ios_deploy_branch = 1.7.0
+
+[buildozer]
+log_level = 2

test_app/main.kv

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+BoxLayout:
+    orientation: "vertical"
+
+    Label:
+        id: hello_label
+        text: "Hello World"
+        on_text: if len(self.text) > 30: self.text = "Stop clicking!"
+
+    Button:
+        text: "Click me!"
+        on_release: hello_label.text += "!"

test_app/main.py

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+"""
+Simple Hello World app to test Buildozer Action.
+
+It builds Kivy app with file main.kv.
+"""
+
+from kivy.app import App
+from kivy.lang import Builder
+
+
+class MainApp(App):
+    def build(self):
+        return Builder.load_file("main.kv")
+
+
+if __name__ == "__main__":
+    MainApp().run()