Break dependency of libui on libbinder

the dependency existed only because of
HdrCapabilities, which inherited from
Parcelable, instead of LightFlatenable<>.

An added benefit is that HdrCapabilities isn’t
virtual anymore.

Also, since the dtor is not trivial, move it to
the cpp, to avoid inlining.

Fix-up includes.

Test: built and booted device

Change-Id: Iaf9c4ef9dcc5cb28b29f79d9f7d8f21800223eb8