Small changes and warning cleanup

AndroidManifest.xml

@@ -1,22 +1,31 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-      package="org.traccar.client"
-      android:versionCode="6"
-      android:versionName="1.5">
-    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
-        <activity android:name="TraccarActivity"
-                  android:label="@string/app_name"
-                  android:windowSoftInputMode="stateHidden">
+    package="org.traccar.client"
+    android:versionCode="6"
+    android:versionName="1.5">
+    
+    <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="17" />
+    
+    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
+    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
+    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
+    
+    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher" android:allowBackup="true">
+        
+        <activity
+            android:name="TraccarActivity"
+            android:label="@string/app_name"
+            android:windowSoftInputMode="stateHidden">
+            
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
         </activity>
+
         <service android:name=".TraccarService" />
+    
     </application>
-    <uses-sdk android:minSdkVersion="4" 
-              android:targetSdkVersion="16" />
-    <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
-    <uses-permission android:name="android.permission.INTERNET"></uses-permission>
-    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
+
 </manifest>