CB-113 android: Does not pass sonarqube scan

The problem is "Correctness - Suspicious reference comparison of Boolean values",
which sonarqube considers major.

 This closes #20
diff --git a/src/android/WhitelistPlugin.java b/src/android/WhitelistPlugin.java
index 4e4f57e..2396568 100644
--- a/src/android/WhitelistPlugin.java
+++ b/src/android/WhitelistPlugin.java
@@ -118,7 +118,7 @@
 
     @Override
     public Boolean shouldAllowRequest(String url) {
-        if (Boolean.TRUE == shouldAllowNavigation(url)) {
+        if (shouldAllowNavigation(url)) {
             return true;
         }
         if (allowedRequests.isUrlWhiteListed(url)) {