dev guidelines update

i2p2www/pages/site/get-involved/guides/dev-guidelines.html

@@ -1,6 +1,6 @@
 {% extends "global/layout.html" %}
 {% block title %}{{ _('Developer Guidelines and Coding Style') }}{% endblock %}
-{% block lastupdated %}{% trans %}March 2019{% endtrans %}{% endblock %}
+{% block lastupdated %}{% trans %}April 2019{% endtrans %}{% endblock %}
 {% block content %}
 <p>{% trans newdevs=site_url('get-involved/guides/new-developers') -%}
 Read the <a href="{{ newdevs }}">new developers guide</a> first.
@@ -165,6 +165,13 @@ as Android and embedded applications require only Java 6. All classes must be av
 Java 7 language features are acceptable in these subsystems if supported by the current version
 of the Android SDK and they compile to Java 6-compatible code.
 {%- endtrans %}</li>
+<li>
+Try-with-resources cannot be used in embedded subsystems as it requires java.lang.AutoCloseable
+in the runtime, and this is not available until Android API 19 (KitKat 4.4).
+</li>
+<li>
+Plugin authors may require any minimum Java version via the plugin.config file.
+</li>
 <li>{% trans -%}
 Explicitly convert between primitive types and classes;
 don't rely on autoboxing/unboxing.