Reuse already existing instance of print manager

src/android/Printer.java

@@ -143,7 +143,6 @@ public class Printer extends CordovaPlugin {
         cordova.getThreadPool().execute(new Runnable() {
             @Override
             public void run() {
-                PrintManager pm = new PrintManager(cordova.getActivity());
                 List<PrintServiceInfo> services  = pm.getEnabledPrintServices();
                 Boolean available = services.size() > 0;
 

src/android/ext/PrintManager.java

@@ -24,7 +24,6 @@ package de.appplant.cordova.plugin.printer.ext;
 import android.content.Context;
 import android.print.PrintJob;
 import android.print.PrintJobId;
-import android.print.PrinterInfo;
 
 import java.lang.ref.WeakReference;
 import java.lang.reflect.InvocationHandler;

src/android/reflect/Meta.java

@@ -47,8 +47,10 @@ public abstract class Meta  {
         try {
             return cls.getDeclaredMethod(name, params);
         } catch (NoSuchMethodException e) {
-            return null;
+            e.printStackTrace();
         }
+
+        return null;
     }
 
     /**