Memory Leak on losing focus

https://github.com/android/games-samples/blob/32ff4ddc95617d8592c5859c23daccb3e92dd773/agdk/agdktunnel/app/src/main/cpp/native_engine.cpp#L460C29-L460C29

Every time your app loses focus, the savedState is reallocated and the pointer to the previous allocation is lost. savedState's memory is never deleted.

Start at agdk/agdktunnel/app/src/main/cpp/native_engine.cpp around line 460 and inspect how savedState is allocated and managed when focus changes. Reproduce repeated focus loss in the AGDK Tunnel sample, then verify that savedState ownership is preserved and memory is released appropriately without changing the saved state behavior.

Written by the indexing model from the issue text.