This commit addresses a crash that occurred when ProGuard/R8 removed the `aboutlibraries.json` file, which is necessary for the "About" screen to display third-party library information.

The `Libs.Builder()` call is now wrapped in a `try-catch` block. If an `IllegalStateException` is thrown (indicating the JSON file is missing), the exception is logged, and the `LibrariesContainer` is prevented from rendering, thus avoiding the crash.

A `keep.xml` resource file has also been added to explicitly instruct ProGuard/R8 to retain the `@raw/aboutlibraries` resource, preventing it from being stripped out during release builds.

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>

This commit enhances the robustness of the TCP interface by addressing potential null pointer and IO exceptions during write/flush operations.

- **Null Safety:** The `outStream` property is now nullable (`OutputStream?`) to safely handle cases where `sendBytes` or `flushBytes` are called before a connection is established. Writes and flushes are now guarded by null checks.
- **Error Handling:** `sendBytes` and `flushBytes` now wrap stream operations in `try-catch` blocks to handle `IOException`. If an exception occurs, the connection is properly torn down by calling `onDeviceDisconnect`.
- **State Management:** `outStream` is explicitly set to `null` in `onDeviceDisconnect` to ensure a clean state after disconnection.

Signed-off-by: James Rich <2199651+jamesarich@users.noreply.github.com>