…=2 flags

- Updated shebangs to `#!/usr/bin/env bash` and added `set -euo pipefail` for better error handling.
- Improved emulator setup in `ci-setup-and-run-emulator.sh` by ensuring a fresh AVD state and configuring hardware parameters like RAM and GPU.
- Optimized `ci-wait-for-emulator.sh` with more reliable boot completion checks and a retry loop for internet connectivity.
- Added existence checks for directories and files in artifact and test result publishing scripts to prevent errors when files are missing.
- Cleaned up redundant script headers and refactored argument handling in instrumentation test scripts.

…lator.sh

…DNS property checks

…-wait-for-emulator.sh

…mentation tests

…ication