feat: add per-app language support

Signed-off-by: Lennoard <lennoardrai@gmail.com>

Author: Lennoard

app/src/main/AndroidManifest.xml

@@ -15,12 +15,13 @@
     <application
         android:name=".SysctlGuiApp"
         android:allowBackup="false"
+        android:enableOnBackInvokedCallback="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:localeConfig="@xml/locales_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
-        android:enableOnBackInvokedCallback="true"
         tools:ignore="GoogleAppIndexingWarning">
         <activity android:name=".ui.main.MainActivity" />
         <activity

app/src/main/res/xml/locales_config.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<locale-config xmlns:android="http://schemas.android.com/apk/res/android">
+    <locale android:name="en" />
+    <locale android:name="de" />
+    <locale android:name="pt-rBR" />
+    <locale android:name="tr" />
+</locale-config>