[sf] Pass metadata to layer during composition
Adds the simple bits of code to grab a snapshot of the front-end Layer
generic metadata, storing a copy in LayerFECompositionState, and then
sending int to the HWC2::Layer along with other "geometry update"
settings.
As the metadata stored in the layers uses integer keys, they need to be
translated to name strings. For hard-coded mapping is defined, with a
TODO left to remove the hard-coded mapping.
A test is added to ensure that the metadata is written by OutputLayer
when present, and that it is not set as part of a "per-frame" update.
Bug: 139747351
Test: atest libcompositionengine_test
Change-Id: I63f2a34e1fb70e1aefc5aa7e97ce56b7c2579a29
7 files changed