Merge "Return the default touch mode for dead displays" into udc-dev

    /**

     * Returns the touch mode state for the display id passed as argument.

     *

     * This method will return the default touch mode state (represented by

     * {@code com.android.internal.R.bool.config_defaultInTouchMode}) if the display passed as

     * argument is no longer registered in {@RootWindowContainer}).

     */

    @Override  // Binder call

    public boolean isInTouchMode(int displayId) {

        synchronized (mGlobalLock) {

            final DisplayContent displayContent = mRoot.getDisplayContent(displayId);

            if (displayContent == null) {

                throw new IllegalStateException("Failed to retrieve the touch mode state for"

                        + "display {" + displayId + "}: display is not registered in "

                        + "WindowRootContainer");

                return mContext.getResources().getBoolean(R.bool.config_defaultInTouchMode);

            }

            return displayContent.isInTouchMode();

        }