Added navigation class to abstract activity launching

sample_app/src/main/AndroidManifest.xml

@@ -1,15 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest
-    package="uk.co.alt236.btlescan"
-    xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="uk.co.alt236.btlescan">
 
-    <uses-permission android:name="android.permission.BLUETOOTH"/>
-    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
 
     <uses-feature
         android:name="android.hardware.bluetooth_le"
-        android:required="false"/>
+        android:required="false" />
 
     <application
         android:allowBackup="true"
@@ -20,20 +19,18 @@
             android:name=".ui.main.MainActivity"
             android:label="@string/app_name">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
+                <action android:name="android.intent.action.MAIN" />
 
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity
-            android:name=".ui.details.DeviceDetailsActivity"
-            android:label="@string/app_name">
-        </activity>
-        <activity android:name=".ui.control.DeviceControlActivity"/>
+        <activity android:name=".ui.details.DeviceDetailsActivity" />
+
+        <activity android:name=".ui.control.DeviceControlActivity" />
 
         <service
             android:name="uk.co.alt236.btlescan.services.BluetoothLeService"
-            android:enabled="true"/>
+            android:enabled="true" />
     </application>
 
 </manifest>