Landscape only (#533)

* Landscape only option

* Fixed typo

* Removed old startApp

* Spacing

android/app/src/main/AndroidManifest.xml

         <activity
             android:name=".controllers.PortraitNavigationActivity"
             android:screenOrientation="portrait" />
+        <activity
+            android:name=".controllers.LandscapeNavigationActivity"
+            android:screenOrientation="landscape" />
         <activity
             android:name="com.facebook.react.devsupport.DevSettingsActivity"
             android:exported="false" />

android/app/src/main/java/com/reactnativenavigation/bridge/NavigationReactModule.java

     @ReactMethod
     public void startApp(final ReadableMap params) {
         boolean portraitOnlyMode = false;
+        boolean landscapeOnlyMode = false;
+
         if (params.hasKey("portraitOnlyMode")) {
             portraitOnlyMode = params.getBoolean("portraitOnlyMode");
         }
-        NavigationCommandsHandler.startApp(BundleConverter.toBundle(params), portraitOnlyMode);
+
+        if (params.hasKey(("landscapeOnlyMode"))) {
+            landscapeOnlyMode = params.getBoolean("landscapeOnlyMode");
+        }
+
+        NavigationCommandsHandler.startApp(BundleConverter.toBundle(params), portraitOnlyMode, landscapeOnlyMode);
     }
 
     @ReactMethod

android/app/src/main/java/com/reactnativenavigation/controllers/LandscapeNavigationActivity.java

+package com.reactnativenavigation.controllers;
+
+public class LandscapeNavigationActivity extends NavigationActivity {
+}

android/app/src/main/java/com/reactnativenavigation/controllers/NavigationCommandsHandler.java

      *
      * @param params ActivityParams as bundle
      */
-    public static void startApp(Bundle params, boolean portraitOnlyMode) {
+
+    public static void startApp(Bundle params, boolean portraitOnlyMode, boolean landscapeOnlyMode) {
         Intent intent;
         if (portraitOnlyMode) {
             intent = new Intent(NavigationApplication.instance, PortraitNavigationActivity.class);
+        } else if (landscapeOnlyMode) {
+            intent = new Intent(NavigationApplication.instance, LandscapeNavigationActivity.class);
         } else {
             intent = new Intent(NavigationApplication.instance, NavigationActivity.class);
         }