Show the license dialog only if the activity is still showing

Bug: 6888990
Change-Id: Ide267739c7fd296356f26293f02bd794906fbd0a

src/com/android/settings/SettingsLicenseActivity.java

@@ -203,8 +203,10 @@ public class SettingsLicenseActivity extends Activity {
             @Override
             public void onPageFinished(WebView view, String url) {
                 mSpinnerDlg.dismiss();
+                if (SettingsLicenseActivity.this.isResumed()) {
                     mTextDlg.show();
                 }
+            }
         });
 
         mWebView = null;