TileGrid now includes an optional revealEffectContainer parameter (v2)

These changes were previously introduced in ag/33705712, but were
reverted due to a jank issue (b/420763127).

This CL reintroduces those same changes, with the reveal effect always
disabled (revealEffectContainer is always null). The reveal effect will
be enabled in a subsequent CL.

If specified, this parameter will hold the container key used to apply a
reveal effect to the tile.

Test: Manually tested on dual shade
Bug: 410524175
Flag: com.android.systemui.scene_container
Change-Id: I38125c8dd67457484c8efd39786c2630888be729