Merge "Add a comment for secondary user handling in IMMS"

        mFileManager = new InputMethodFileManager(mMethodMap, newUserId);

        final String defaultImiId = mSettings.getSelectedInputMethod();

        final boolean needsToResetDefaultIme = TextUtils.isEmpty(defaultImiId);

        // For secondary users, the list of enabled IMEs may not have been updated since the

        // callbacks to PackageMonitor are ignored for the secondary user. Here, defaultImiId may

        // not be empty even if the IME has been uninstalled by the primary user.

        // Even in such cases, IMMS works fine because it will find the most applicable

        // IME for that user.

        if (DEBUG) {

            Slog.d(TAG, "Switch user: " + newUserId + " current ime = " + defaultImiId);

        }