fix: improve Android transcription failure diagnostics

[grapeot]

Summary

• classify Android speech transcription failures into local audio, client parsing, network/WebSocket, server, and config stages so logcat shows where a failure originated
• add stage-specific logging in the recorder and AI Builders audio client, including session creation, websocket connect, send, and server error events
• surface the same stage context in user-visible speech errors to make bug reports actionable without digging through generic transcription failed messages

Verification

• ./gradlew --no-daemon assembleDebug
• ./gradlew --no-daemon testDebugUnitTest