update: Set the webView frame dimension to the pluginScrollView
This allows the cordova-plugin-statusbar shift down 20px mandatory.
MODIFY
plugin.xml
plugin.xml
<?xml version='1.0' encoding='utf-8'?>
-<plugin id="cordova-plugin-googlemaps" version="2.0.9-beta-20170914-1830" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android">
+<plugin id="cordova-plugin-googlemaps" version="2.0.9-beta-20170915-1020" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android">
<name>cordova-plugin-googlemaps</name>
<js-module name="BaseClass" src="www/BaseClass.js">
<runs />

MODIFY
src/ios/GoogleMaps/MyPluginLayer.m
src/ios/GoogleMaps/MyPluginLayer.m
@@ -207,6 +207,7 @@ BOOL hasCordovaStatusBar = NO; // YES if the app has cordova-plugin-statusbar
- (void)updateViewPosition:(GoogleMapsViewController *)mapCtrl {
CGFloat zoomScale = self.webView.scrollView.zoomScale;
+ [self.pluginScrollView setFrame:self.webView.frame];
CGPoint offset = self.webView.scrollView.contentOffset;
offset.x *= zoomScale;

update: Set the webView frame dimension to the pluginScrollView

This allows the cordova-plugin-statusbar shift down 20px mandatory.