config: disable automatic backups

https://developer.android.com/identity/data/autobackup#EnablingAutoBackup

Author: jo-elimu

app/src/main/AndroidManifest.xml

@@ -9,7 +9,7 @@
     <application
         android:networkSecurityConfig="@xml/network_security_config"
         android:name=".BaseApplication"
-        android:allowBackup="true"
+        android:allowBackup="false"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"