commit 5d4ef457c51b4d545b7cc40f43fcd94101675bbf
author Robert Carr <racarr@google.com> Tue Nov 30 14:34:10 2021 -0800
committer Rob Carr <racarr@google.com> Fri Jan 14 21:41:30 2022 +0000
tree a2f594d1c83c04c39f82e8386115d7209b75a0ee
parent 84a606287e52d874e588899629933f9debbe450d

WindowManager: Add basics of generic overlay support.

WindowContainer is extended with basic support for overlay at any
level of the hierarchy. Overlays are provided via a
SurfaceControlViewHost. Using SurfaceControlViewHost
instead of WindowState lets us flexibly attach at any level of the
hierarchy. We forward configuration changes over the new
SurfaceControlViewHost side-channel. WMS grows add and removeTaskOverlay
as specific instantiations, to be called first by game overlay
service.

Bug: 213603716
Test: Existing tests pass
Change-Id: I82c427ad9cd42cbbc0c994afdfcf32be39370164