Update app-profile.md and strings.xml (#712)

1. website: Correcting several errors in docs of App Profile
2. manager: Remove the 'app name' field except for the default
strings.xml file

manager/app/src/main/res/values-ar/strings.xml

@@ -1,6 +1,4 @@
 <resources>
-    <string name="app_name" translatable="false">KernelSU</string>
-
     <string name="home">الرئيسية</string>
     <string name="home_not_installed">غير مثبت</string>
     <string name="home_click_to_install">إضغط للتثبيت</string>