WindowStateAnimator: Abstract global transaction usage (1/n).

For the BLASTSyncEngine we will need all WSA GlobalTransaction
usage to be redirected to the pending transaction instead.

To prepare for this we first slimmed down WSA as much as possible
to make the remaining job easier. As a next step we start refactoring
code to use a passed in Transaction, but without chasing the global
Transaction all the way to the top. To do this we expose the global
transaction from SurfaceControl.java but with a special wrapper
that makes sure we don't accidentally call apply directly.

As we start cleaning up global transaction usage we can remove some
variants in WindowSurfaceController. In this CL we get setMatrix
and setPosition global variants removed.

Bug: 161937501
Test: Existing tests pass
Change-Id: Ibd8f710c8ca01e57f6f994f23dd7bf2dca3902fd