Remove outFrame from the parameters of addWindow

This CL moves computeWindowBounds to the client side. The client can use
it to compute the frame hint on its own.

This can be a step to make client compute its window frame locally.

Bug: 161810301
BUg: 175858823
Test: atest WindowAddRemovePerfTest ActivityRecordTests
            DisplayPolicyLayoutTests TaskSnapshotSurfaceTest
Change-Id: Ia5af1919b8e0e973646a63d1a4c3bf7ea7e2d1f6