Remove orientation restriction to only fullscreen activities.

This changelist removes checks that enforce that only fullscreen,
opaque activities may request orientation changes. An application
may itself be compatible with the change and update their SDK level.
However, it is possible they use a library that has not itself been
updated and still leverages this feature for non-fullscreen
activities.

Change-Id: Ie1d300e3531fc8c588d2124dea698e4a876713c2
Fixes: 68684796
Test: bit FrameworksServicesTests:com.android.server.wm.AppWindowTokenTests