Revert "remove support for html attribute"

This reverts commit fa43d00.

Author: sparten11740

android/src/main/java/com/reactnativecommunity/webview/RNCWebViewManager.java

@@ -445,6 +445,12 @@ public void setIncognito(WebView view, boolean enabled) {
   @ReactProp(name = "source")
   public void setSource(WebView view, @Nullable ReadableMap source) {
     if (source != null) {
+      if (source.hasKey("html")) {
+        String html = source.getString("html");
+        String baseUrl = source.hasKey("baseUrl") ? source.getString("baseUrl") : "";
+        view.loadDataWithBaseURL(baseUrl, html, HTML_MIME_TYPE, HTML_ENCODING, null);
+        return;
+      }
       if (source.hasKey("uri")) {
         String url = source.getString("uri");
         String previousUrl = view.getUrl();