Modified last of reflection calls to use ReflectHelper class

Also modified ReflectHelper class to consolidate the API and
modified browser code to reflect the API changes.

Change-Id: I708f43cf3c1432adc7cd78c25264330a673ffeb5
diff --git a/src/com/android/browser/UploadHandler.java b/src/com/android/browser/UploadHandler.java
index 8dec49c..349f67f 100644
--- a/src/com/android/browser/UploadHandler.java
+++ b/src/com/android/browser/UploadHandler.java
@@ -125,7 +125,7 @@
         Object[] params  = {new String("persist.env.browser.drmupload"),
                             Boolean.valueOf(false)};
         Class[] type = new Class[] {String.class, boolean.class};
-        Boolean drmUpload = (Boolean) ReflectHelper.invokeStaticMethod(
+        Boolean drmUpload = (Boolean) ReflectHelper.invokeMethod(
                       "android.os.SystemProperties", "getBoolean", type, params);
         if (drmUpload && isDrmFileUpload(result)) {
             mUploadMessage.onReceiveValue(null);