Sharesheet - Fix scroll behavior moving past bounds

ResolverDrawerLayout is tracking fractions of pixels, but just drops
these fractions when offsetting the child views. When scrolling up and
down continuously, this can lead to the view scrolling past the window
bounds. Do not discard these fractions. Track the remainders and add
them in when the sum to >= 1px.

Bug: 129979914
Test: Manual scrolling test
Change-Id: I0e8ea04baca341c6b6e0573e086f3f2f8c2b39b5