Fix the incorrect title of Panel

Since panel activity is singleInstance, a newer panel will reuse the
same fragment as the previous panel when they are displayed one after
another.

Panel fragment has two kinds of exclusive header layout which shouldn't
be showed at the same time, so we have to reset their visible states
when creating panel content.

Fixes: 154668079
Test: robotest
Change-Id: I701a7cde4b43322fbc63ae1cb74c41dd23b37c0c