SF: Frontend fixes for issues surfaced by SurfaceFlinger_test

- separate color and bgcolor in layer state so we don't set a color
 on a layer without a buffer
 - avoid using legacy layer state when latching a buffer
 - fix callback issue where invisible or offscreen layers were not invoking
 the callbacks
 - pass in layer snapshot for trusted presentation state
 - fix a screenshot issue where the root layer was skipped
 - pass in framerate changes to layer history

Test: presubmit
Test: atest SurfaceFlinger_test with new fe
Bug: 238781169

Change-Id: Id9ff8a036dc283e21a05985c1c01ebd070b1df24
diff --git a/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
index 852cb91..cdcc6f4 100644
--- a/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
+++ b/services/surfaceflinger/tests/unittests/LayerHierarchyTest.h
@@ -172,7 +172,7 @@
         transactions.emplace_back();
         transactions.back().states.push_back({});
         transactions.back().states.front().state.what = layer_state_t::eBackgroundColorChanged;
-        transactions.back().states.front().state.bgColorAlpha = alpha;
+        transactions.back().states.front().state.bgColor.a = alpha;
         transactions.back().states.front().state.surface = mHandles[id];
         mLifecycleManager.applyTransactions(transactions);
     }