chore(deps): update android_logger requirement from 0.13 to 0.15 (#13)

Updates the requirements on
[android_logger](https://github.com/rust-mobile/android_logger-rs) to
permit the latest version.
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crates/neurophone-android/Cargo.toml

@@ -20,5 +20,5 @@ tokio = { workspace = true }
 chrono = { workspace = true }
 
 [target.'cfg(target_os = "android")'.dependencies]
-android_logger = "0.13"
+android_logger = "0.15"
 log = "0.4"