Window inset support for CoL + AppBarLayout DO NOT MERGE

CoL now handles and consumes all window insets given
to it on L+. AppBarLayout and it's Behaviors have special
handling to ensure it's view are measured correctly.
CollapsingToolbarLayout has handling to ensure that view are
not laid out within the insets.

BUG: 20652400

Change-Id: Ifa8677aa8abeaf443c53bbe6b53e29ff1859b18d
8 files changed