fix: replace tracing-android with android_logger (no sharded_slab SIGSEGV)

tracing_subscriber::registry() allocates a sharded_slab which causes
SIGSEGV on Android 16 MTE devices during nativeInit. catch_unwind
can't catch SIGSEGV (it's a signal, not a panic).

Replace with android_logger (lightweight, no large allocations) +
tracing-log bridge so tracing::info! macros still work via logcat.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/wzp-android/Cargo.toml

@@ -17,7 +17,6 @@ wzp-crypto = { workspace = true }
 wzp-transport = { workspace = true }
 tokio = { workspace = true }
 tracing = { workspace = true }
-tracing-subscriber = { workspace = true, features = ["env-filter"] }
 bytes = { workspace = true }
 serde = { workspace = true }
 serde_json = "1"
@@ -28,7 +27,9 @@ libc = "0.2"
 jni = { version = "0.21", default-features = false }
 rand = { workspace = true }
 rustls = { version = "0.23", default-features = false, features = ["ring"] }
-tracing-android = "0.2"
+android_logger = "0.14"
+log = "0.4"
+tracing-log = "0.2"
 
 [build-dependencies]
 cc = "1"