add android gallery example to javaclasswrapper doc

Author: noahlessard

tutorials/platform/android/javaclasswrapper_and_androidruntimeplugin.rst

@@ -133,3 +133,27 @@ This example creates an intent to send a text:
         intent.putExtra(Intent.EXTRA_TEXT, "This is a test message.")
         intent.setType("text/plain")
         activity.startActivity(intent)
+
+Example: Using an Intent to Save an Image to an Android Gallery
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. code-block:: gdscript
+    # Retrieve the AndroidRuntime singleton.
+	var android_runtime = Engine.get_singleton("AndroidRuntime")	
+	if android_runtime:
+		var Intent = JavaClassWrapper.wrap("android.content.Intent")
+		var Uri = JavaClassWrapper.wrap("android.net.Uri")
+		var File = JavaClassWrapper.wrap("java.io.File")
+
+		# Create the File and Uri
+		var file = File.File(file_path_to_image_here)
+		var uri = Uri.fromFile(file)
+
+		# Build the Intent
+		var intent = Intent.Intent()
+		intent.setAction(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE)
+		intent.setData(uri)
+
+		# Broadcast it
+		var activity = android_runtime.getActivity()
+		activity.sendBroadcast(intent)