Roll engine back to 96061d62281d1840af3ee75fefa41d1cf254fce6 (#51785)

* Revert #51693
* Revert #51689

https://github.com/flutter/flutter/issues/51776

bin/internal/engine.version

diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index ba0f76e..e6d045a 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-755e2b559d4dc5e3a5788e36b4513b497bff2a0c
+96061d62281d1840af3ee75fefa41d1cf254fce6