Updated bottomsheet to be scrollable.

Follow-up CLs will include:
 - white bottom nav
 - setting status bar color when expanded, translucent otherwise
 - automatically dismissing the bottomsheet onPause in calllog/vvm

Bug: 73495458,77761183,77812338,77816530,77833456
Test: manual
PiperOrigin-RevId: 194967761
Change-Id: Iea81035efd06ae7692950ca1f11757b7d9ebfd1c