When using SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN and
fitsSystemWindows="true", there are cases when the
inner insets will change but the content insets will
remain the same.
One case where this happens is when using
windowSoftInputMode="adjustResize|stateHidden",
bringing the keyboard up, hitting the Recents button,
then going back into the app.
By issuing a requestLayout when the base inner insets
change, we ensure that the inner layout is properly
updated, avoiding an empty space where they keyboard
used to be.
Test: Run app from b/37743589#comment6
BUG: 37743589
Change-Id: I7615c51b8f4eee3971b9b95e638011c1d885b3a6
67c0b1b51e