Also clean up the demo for the w/h qualifiers to use numbers
that are the same as what we will be recommending.
Change-Id: I87ed35d8dfcb41985e19f450f7853f883effd207
New API demo for the support library FragmentPager class.
Add API demo for new -wNNNdp and -hNNNdp configs.
Add new API demo for implementing a custom loader.
Also turn the fragment cursor list demo into a loader cursor demo.