Revert "Reland "Roll Engine from 6993cb229b99 to c217d9d06e4f (60 revisions)...

Revert "Reland "Roll Engine from 6993cb229b99 to c217d9d06e4f (60 revisions) (#76352)" (#76394)" (#76403)

This reverts commit 562f53bf.

bin/internal/engine.version

-c217d9d06e4fabff38b508e9b7ae3b66bef444d5
+6993cb229b99e6771c6c6c2b884ae006d8160a0f

bin/internal/fuchsia-linux.version

-elAhIisHyiDFkJn3QtKiszy5_gVuVxYBXOaq8G1UdIYC
+C2FaCuCLBodZ7wd7Nnx47CMW8mCNhEAn5WgwjbALW_EC

bin/internal/fuchsia-mac.version

-odBGYc9-_5r5r5D5J1l93OEYqshV4w1IDTdbgKJNAFgC
+eG4TqZBn9_INWPNwIkB8VRhzfJcRqCHfby_c0kqMlUwC

dev/devicelab/lib/versions/gallery.dart

@@ -3,4 +3,4 @@
 // found in the LICENSE file.
 
 /// The pinned version of flutter gallery, used for devicelab tests.
-const String galleryVersion = 'e2cfe22e9fa0b585b719cd911439fc80a3c27f39';
+const String galleryVersion = '8542ca8beebc8e989adee160f7f1f0841a734db2';