Manual engine roll (#35407)

```
45b66b722e1275c47dccbe6b002c8e4cb13ea983 Revert " Roll src/third_party/dart b37aa3b036...1eb113ba27 (#9559)" (#9584)
fc1d86b7580bc65a3b816b38d3b4c114079ccdf9 Revert "Avoid a full screen overlay within virtual displays (#9343)" (#9581)
140b2aef5ed381aecc13e262d1e2bb3b70960b3b  Roll src/third_party/dart b37aa3b036...1eb113ba27 (#9559)
94bb7a7ff2a52e9e69b9b4228b5a3ec9fb1e5127 Adds API for retaining intermediate engine layers (#9461)
7d1508d989e682b7fbc1e43db8053e7ded369154 Roll fuchsia/sdk/core/mac-amd64 from cFEtOUFvy2XYSKuSmCMDaMQV8_Y7GOif521L3x86J_4C to n9fZpXVmsbgKZzS8Q2GXxB453q8AbLpfGztsPsq47pMC (#9579)
7a0bbf935599b223352312a20ceabbe2dd2eb3ac Fixed memory leak by way of accidental retain on implicit self (#9329)
```

bin/internal/engine.version

-e96900df2f273920f7da46ae589b859d5a1fccb3
+45b66b722e1275c47dccbe6b002c8e4cb13ea983