fix: enable full debug symbols in Rust native bindings

Add debug = 2 to release profile in all three Rust binding crates
so AGP can generate native-debug-symbols.zip for Play Store.
Also updated RELEASE_GOOGLE_OAUTH_ID secret to correct Android
client ID (was incorrectly set to Web client type).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bindings/metadata_shortener/rust/Cargo.toml

@@ -15,6 +15,7 @@ codec = { package = "parity-scale-codec", version = "3.6.9", features = [ "deriv
 
 [profile.release]
 strip = false
+debug = 2
 lto = true
 opt-level = "s"