[sf] fix screenshots when new fe is enabled

- Use uid in layer state when filtering by uid for screenshots
  because there is a mismatch between uid provided by layer
  and input info (b/271132344)
- Pass transform and buffersize into LayerRenderArea so we
  don't need to check legacy drawing state.

Bug: 238781169
Test: atest SurfaceFlinger_test

Change-Id: I2bd5ceeba8303cad2996f521ea03f727269a7a96