Remove the active tabs page when pausing the BrowserActivity.

This fixes http://b/issue?id=2113505

Change-Id: Ibb66546a86082986170ec983c4e081008182baac
diff --git a/src/com/android/browser/BrowserActivity.java b/src/com/android/browser/BrowserActivity.java
index 7e0db56..7e0f93d 100644
--- a/src/com/android/browser/BrowserActivity.java
+++ b/src/com/android/browser/BrowserActivity.java
@@ -960,6 +960,14 @@
         }
         mCredsDlg = null;
 
+        // FIXME: This removes the active tabs page and resets the menu to
+        // MAIN_MENU.  A better solution might be to do this work in onNewIntent
+        // but then we would need to save it in onSaveInstanceState and restore
+        // it in onCreate/onRestoreInstanceState
+        if (mActiveTabsPage != null) {
+            removeActiveTabPage(true);
+        }
+
         cancelStopToast();
 
         // unregister network state listener