Split the project into a library and sample app

sample_app/res/values/dimens.xml

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+<resources>
+
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+
+</resources>

sample_app/res/values/strings.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <string name="app_name">Bluetooth LE Scanner</string>
+    <string name="action_settings">Settings</string>
+    <string name="hello_world">Hello world!</string>
+    <string name="off">Off</string>
+    <string name="on">On</string>
+    <string name="not_supported">Not supported</string>
+    <string name="supported">Supported</string>
+    <string name="no_data">No data</string>
+    <string name="unknown_device">Unknown Device</string>
+
+    <!-- Menu items -->
+    <string name="menu_connect">Connect</string>
+    <string name="menu_disconnect">Disconnect</string>
+    <string name="menu_scan">Scan</string>
+    <string name="menu_stop">Stop</string>
+
+</resources>

sample_app/res/values/styles.xml

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+<resources>
+
+    <!--
+        Base application theme, dependent on API level. This theme is replaced
+        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Light">
+        <!--
+            Theme customizations available in newer API levels can go in
+            res/values-vXX/styles.xml, while customizations related to
+            backward-compatibility can go here.
+        -->
+    </style>
+
+    <!-- Application theme. -->
+    <style name="AppTheme" parent="AppBaseTheme">
+        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
+    </style>
+
+</resources>