Track making activity resizeable based on sdk version separately.

To support resizeable home activities we need to make the home activity
resizeable only when the app explicitly says it is resizeable. To be able
to do that we need to track if we are allowing the app to be resizeable
due to the sdk version it is targetting separately from it explicitly
setting it so that activity manager and window manager can make the right
choices in a follow-up CL.

Bug: 30982291
Test: cts/hostsidetests/services/activityandwindowmanager/util/run-test android.server.cts
Change-Id: I10f53ee9e57a41a3edece91cf68c5e8ef4bf4489