tree bfae2157fa02a7d34c6c7f4b1961a1caf0e379b5
parent b1579c8d898811010b60eab4e996f3d071980155
author Robert Carr <racarr@google.com> 1506995916 -0700
committer Robert Carr <racarr@google.com> 1511198052 -0800

Reimplement DimLayer's using hierarchy.

Still missing the fade in/out animation. See Dimmer.java for details.

Bug: 64815723
Bug: 64816140
Test: DimmerTests.java. Existing tests pass. go/wm-smoke. Docked resizing Dim layer works, various dialog dim layers work.
Change-Id: I19a03f1b6b602475410fcfb2c9728aae1d0bed85