SurfaceComposerClient: Clean up layer state

- align layer alpha/color with SF layer drawing state
- remove unused flags and fields

Bug: 238781169
Test: presubmit

Change-Id: I4be9c56b3006b7d7a0ca19160511ebb9e3551a8c
diff --git a/services/surfaceflinger/layerproto/transactions.proto b/services/surfaceflinger/layerproto/transactions.proto
index b687abc..4c6a9cf 100644
--- a/services/surfaceflinger/layerproto/transactions.proto
+++ b/services/surfaceflinger/layerproto/transactions.proto
@@ -98,8 +98,7 @@
         eReparent = 0x00008000;
 
         eColorChanged = 0x00010000;
-        eDestroySurface = 0x00020000;
-        eTransformChanged = 0x00040000;
+        eBufferTransformChanged = 0x00040000;
         eTransformToDisplayInverseChanged = 0x00080000;
 
         eCropChanged = 0x00100000;