fix!: Make CoreAndroid plugin instantiate on load (apache#1605)

I don't anticipate breaking changes from this change, however it is a difference
in behaviour since CoreAndroid won't be lazily loaded, therefore I've marked this
commit has a breaking change.

framework/src/org/apache/cordova/CordovaWebViewImpl.java

@@ -115,7 +115,7 @@ public void init(CordovaInterface cordova, List<PluginEntry> pluginEntries, Cord
         // This isn't enforced by the compiler, so assert here.
         assert engine.getView() instanceof CordovaWebViewEngine.EngineView;
 
-        pluginManager.addService(CoreAndroid.PLUGIN_NAME, "org.apache.cordova.CoreAndroid");
+        pluginManager.addService(CoreAndroid.PLUGIN_NAME, "org.apache.cordova.CoreAndroid", true);
         pluginManager.init();
     }
 

framework/src/org/apache/cordova/PluginManager.java

@@ -197,7 +197,18 @@ public CordovaPlugin getPlugin(String service) {
      * @param className         The plugin class name
      */
     public void addService(String service, String className) {
-        PluginEntry entry = new PluginEntry(service, className, false);
+        addService(service, className, false);
+    }
+
+    /**
+     * Add a plugin class that implements a service to the service entry table.
+     * 
+     * @param service           The service name
+     * @param className         The plugin class name
+     * @param onload            If true, the plugin will be instantiated immediately
+     */
+    public void addService(String service, String className, boolean onload) {
+        PluginEntry entry = new PluginEntry(service, className, onload);
         this.addService(entry);
     }