Fix config options for Android release builds

Using reflection was not a good idea because when the Android App is
compiled for release mode, some code optimizations are executed. The
fields of the configuration classes were then renamed and the mapping
via reflections did not work again. Now everything has an explicit
mapping form the untyped HashMap to the class fields and vice versa.

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/ChromeCustomTabs/ChromeCustomTabsOptions.java

@@ -2,7 +2,11 @@
 
 import com.pichillilorenzo.flutter_inappwebview.Options;
 
-public class ChromeCustomTabsOptions extends Options {
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+public class ChromeCustomTabsOptions implements Options {
 
     final static String LOG_TAG = "ChromeCustomTabsOptions";
 
@@ -12,4 +16,44 @@ public class ChromeCustomTabsOptions extends Options {
     public boolean enableUrlBarHiding = false;
     public boolean instantAppsEnabled = false;
 
+    ChromeCustomTabsOptions parse(HashMap<String, Object> options) {
+        Iterator it = options.entrySet().iterator();
+        while (it.hasNext()) {
+            Map.Entry<String, Object> pair = (Map.Entry<String, Object>) it.next();
+            String key = pair.getKey();
+            Object value = pair.getValue();
+
+            switch (key) {
+                case "addShareButton":
+                    addShareButton = (boolean) value;
+                    break;
+                case "showTitle":
+                    showTitle = (boolean) value;
+                    break;
+                case "toolbarBackgroundColor":
+                    toolbarBackgroundColor = (String) value;
+                    break;
+                case "enableUrlBarHiding":
+                    enableUrlBarHiding = (boolean) value;
+                    break;
+                case "instantAppsEnabled":
+                    instantAppsEnabled = (boolean) value;
+                    break;
+            }
+        }
+
+        return this;
+    }
+
+    @Override
+    public HashMap<String, Object> getHashMap() {
+        HashMap<String, Object> options = new HashMap<>();
+        options.put("addShareButton", addShareButton);
+        options.put("showTitle", showTitle);
+        options.put("toolbarBackgroundColor", toolbarBackgroundColor);
+        options.put("enableUrlBarHiding", enableUrlBarHiding);
+        options.put("instantAppsEnabled", instantAppsEnabled);
+
+        return options;
+    }
 }

android/src/main/java/com/pichillilorenzo/flutter_inappwebview/InAppBrowserOptions.java

@@ -1,6 +1,10 @@
 package com.pichillilorenzo.flutter_inappwebview;
 
-public class InAppBrowserOptions extends Options {
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+
+public class InAppBrowserOptions implements Options {
 
   public static final String LOG_TAG = "InAppBrowserOptions";
 
@@ -13,4 +17,57 @@ public class InAppBrowserOptions extends Options {
   public boolean hideTitleBar = false;
   public boolean closeOnCannotGoBack = true;
   public boolean progressBar = true;
+
+  public InAppBrowserOptions parse(HashMap<String, Object> options) {
+    Iterator it = options.entrySet().iterator();
+    while (it.hasNext()) {
+      Map.Entry<String, Object> pair = (Map.Entry<String, Object>) it.next();
+      String key = pair.getKey();
+      Object value = pair.getValue();
+
+      switch (key) {
+        case "hidden":
+          hidden = (boolean) value;
+          break;
+        case "toolbarTop":
+          toolbarTop = (boolean) value;
+          break;
+        case "toolbarTopBackgroundColor":
+          toolbarTopBackgroundColor = (String) value;
+          break;
+        case "toolbarTopFixedTitle":
+          toolbarTopFixedTitle = (String) value;
+          break;
+        case "hideUrlBar":
+          hideUrlBar = (boolean) value;
+          break;
+        case "hideTitleBar":
+          hideTitleBar = (boolean) value;
+          break;
+        case "closeOnCannotGoBack":
+          closeOnCannotGoBack = (boolean) value;
+          break;
+        case "progressBar":
+          progressBar = (boolean) value;
+          break;
+      }
+    }
+
+    return this;
+  }
+
+  @Override
+  public HashMap<String, Object> getHashMap() {
+    final HashMap<String, Object> options = new HashMap<>();
+    options.put("hidden", hidden);
+    options.put("toolbarTop", toolbarTop);
+    options.put("toolbarTopBackgroundColor", toolbarTopBackgroundColor);
+    options.put("toolbarTopFixedTitle", toolbarTopFixedTitle);
+    options.put("hideUrlBar", hideUrlBar);
+    options.put("hideTitleBar", hideTitleBar);
+    options.put("closeOnCannotGoBack", closeOnCannotGoBack);
+    options.put("progressBar", progressBar);
+
+    return options;
+  }
 }