Change header of drawer to be wrap content.

This was causing a bug where the header extended to the edge of the
screen and caused elements that were underneath it to be un-clickable.

Test: build apps and verified heaer looks the same. Verified radio card
could be clicked.
Bug: 62804127

Change-Id: I903d7548dc7705a5164ff42fcb35cab380b0626c
1 file changed