Fix mouse pointer not getting enlarged

When show taps enabled, the presentation would be
PRESENTATION_SPOT for drawing the spots. That would
ignore loadPointerIcon when reload resources.

Always load default icon when reload resources.

Bug: 115395392
Test: Enable show taps and use mouse,
      enabled large mouse pointer manually.

Change-Id: I74f2bf33c9046e8eaba7d284ca16366da6e3d221