App gradle and manifest updates due to new Android Studio version

app/build.gradle

@@ -46,6 +46,7 @@ android {
             path 'src/main/cpp/CMakeLists.txt'
         }
     }
+    namespace 'com.tutpro.baresip'
 }
 
 dependencies {

app/src/main/AndroidManifest.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    package="com.tutpro.baresip" >
+    xmlns:tools="http://schemas.android.com/tools">
 
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
@@ -34,7 +33,6 @@
         android:required="false" />
 
     <application
-        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:installLocation="internalOnly"
         android:label="@string/app_name"
@@ -51,7 +49,6 @@
             android:windowSoftInputMode="adjustResize" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             <intent-filter>
@@ -142,7 +139,6 @@
             android:label="@string/about_title"
             android:parentActivityName=".MainActivity" >
         </activity>
-
         <service
             android:name=".BaresipService"
             android:enabled="true"
@@ -150,7 +146,6 @@
             android:permission="android.permission.FOREGROUND_SERVICE"
             android:stopWithTask="false" >
         </service>
-
         <receiver
             android:name=".BootCompletedReceiver"
             android:enabled="true"