Chris Banes 78054fe4ea AppBarLayout + WindowInset handling fixes
When AppBarLayout is used with a CollapsingToolbarLayout
child, it currently does not handle WindowInsets
very well. This commit fixes that by properly handling
insets.

The primary issue is when an AppBarLayout is used
with a single Toolbar (very common use case), where
the Toolbar will currently be displayed behind the status bar.

Another issue is with HeaderScrollingViewBehavior.
To workaround CoordinatorLayout using its 'compatible measuring'
for insets, the behavior manually sets the scrolling view to fit
system windows. This has other issues though because
that view will get padded in. Fixed by manually adding the insets
back into the measured dimensions.

Also updated the catalog layouts to make use of
android:fitsSystemWindows=true

Resolves https://github.com/material-components/material-components-android/pull/299

PiperOrigin-RevId: 238396626
2019-03-22 16:08:28 -04:00
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