Fix Sharesheet nest scrolling issue introduced by using RecyclerView

ResolverDrawerLayout did not recognize RecyclerView as a nested
scrollable child. This is causing scrolling on areas other than
RecyclerView in Sharesheet won't trigger scrolling of RecyclerView.
Modified ResolverDrawerLayout to recognize RecyclerView and trigger
scrolling back if RecyclerView has been scrolled.

Bug: 150772409
Test: Built and flashed to crosshatch, dragging the header will first
scroll sharesheet to the top.

Change-Id: I4a0fee09d02ed2193155c4cbb18550df9071cd2e