Lock game to landscape mode

Resolves #5

Author: tophyr

android/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
      com.gamemaker.game
 -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
   android:installLocation="auto"
   android:versionCode="1"
   android:versionName="devel">
@@ -71,11 +72,13 @@
     <activity
       android:name="MainActivity"
       android:alwaysRetainTaskState="true"
+      android:screenOrientation="sensorLandscape"
       android:configChanges="layoutDirection|locale|orientation|uiMode|screenLayout|screenSize|smallestScreenSize|keyboard|keyboardHidden|navigation"
       android:exported="true"
       android:label="@string/app_name"
       android:launchMode="singleInstance"
-      android:preferMinimalPostProcessing="true">
+      android:preferMinimalPostProcessing="true"
+      tools:ignore="DiscouragedApi">
 
       <!-- Let Android know that we can handle some USB devices and should receive this event -->
       <intent-filter>