Add custom keymap switch

Author: hacker1024

app/src/main/res/layout/activity_settings.xml

@@ -6,4 +6,17 @@
     android:layout_height="match_parent"
     tools:context=".SettingsActivity">
 
+    <Switch
+        android:id="@+id/switch1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="28dp"
+        android:switchPadding="20dp"
+        android:text="@string/switch_label_custom_keymap"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 </android.support.constraint.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -7,4 +7,5 @@
     <string name="about_description">CTROLLER for Android is a port of phijor\'s CTROLLER app for linux to android. It allows you to use your Nintendo 3DS as a game controller for android.</string>
     <string name="about_version_header">Versions:</string>
     <string name="settings_title">CTROLLER keymap</string>
+    <string name="switch_label_custom_keymap">Use custom keymap?</string>
 </resources>