Update message layout

When landscape and display size is large, the message text might
disappear because its position is out of layout.
Set layout height to wrap content to avoid such bug.

Bug: 143253148
Bug: 144070373
Bug: 144444443
Test: manual
Test: atest DocumentsUIGoogleTests
Change-Id: I0e378e77958a7c5c956f0f5f31a1a122896baa6a