Support customize layout in CollapsingToolbarBaseActivity

We introduced the collapsing toolbar on S. To enable this feature needs
to correspondingly adjust the theme that the activity uses. However
these changes might cause some mainline module apps get crashed when
running on R. A customize layout is allowed to use for some cases that
need to roll back to the layout used in R.

Bug: 192395187
Test: visual verified
Change-Id: I9b409842198a2d52a6440cdd9ad68268293681f2