If the "maxFiles" keyword is missing, assign a default value of 5 to align with the documentation. (#2148)

* Fix the issure in Android where the photo picker does not support a maxFiles selection limit.

* Fix the error in the setConfiguration function when retrieving maxFiles from options. If the maxFiles keyword is missing, assign a default value of 5 to align with the documentation.

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Co-authored-by: BruceWang <Bruce.Wang@grapecity.com>

Author: xgtz421

android/src/main/java/com/reactnative/ivpusic/imagepicker/PickerModule.java

@@ -137,7 +137,7 @@ private void setConfiguration(final ReadableMap options) {
         includeExif = options.hasKey("includeExif") && options.getBoolean("includeExif");
         width = options.hasKey("width") ? options.getInt("width") : 0;
         height = options.hasKey("height") ? options.getInt("height") : 0;
-        maxFiles = options.hasKey("maxFiles") ? options.getInt("maxFiles") : 0;
+        maxFiles = options.hasKey("maxFiles") ? options.getInt("maxFiles") : maxFiles;
         cropping = options.hasKey("cropping") && options.getBoolean("cropping");
         cropperActiveWidgetColor = options.hasKey("cropperActiveWidgetColor") ? options.getString("cropperActiveWidgetColor") : null;
         cropperStatusBarColor = options.hasKey("cropperStatusBarColor") ? options.getString("cropperStatusBarColor") : null;