Added lifecycle methods for checking user auth status.

Author: ashryanbeats

asset-browser-ui/app/src/main/java/com/adobe/assetbrowserui/MainActivity.java

@@ -1,5 +1,6 @@
 package com.adobe.assetbrowserui;
 
+import android.content.Intent;
 import android.os.Bundle;
 import android.support.design.widget.FloatingActionButton;
 import android.support.design.widget.Snackbar;
@@ -71,6 +72,42 @@ private void showAuthenticatedUI() {
 
     }
 
+    @Override
+    protected void onResume() {
+        super.onResume();
+        mAuthSessionHelper.onResume();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mAuthSessionHelper.onPause();
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+        mAuthSessionHelper.onStart();
+    }
+
+    @Override
+    protected void onStop() {
+        super.onStop();
+        mAuthSessionHelper.onStop();
+    }
+
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        mAuthSessionHelper.onDestroy();
+    }
+
+    @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        mAuthSessionHelper.onActivityResult(requestCode, resultCode, data);
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         // Inflate the menu; this adds items to the action bar if it is present.