Add test for non-BLE device selected with personal audio sharing

Adds a new unit test to cover the scenario where personal audio sharing (LE Audio Broadcast) is supported, but the currently selected audio output device is not a BLE headset (e.g., the built-in speaker).

This test verifies that in this state:
- No routes are available for selection to start a broadcast session.
- No routes are deselectable.
- The session release type is correctly reported as unsupported.


Please help fill out the survey for feedback: https://docs.google.com/forms/d/e/1FAIpQLSeKFKpHImCAqZIa_OR801cw72HQUreM2oGM25C3mKKT2tBFnw/viewform?usp=pp_url&entry.1586624956=ag/35413605

Please feel free to use your domain knowledge to make changes to the generated tests to make it more valuable for your team.

Original Change: ag/34855603 (Note tests are based on the original CL but may add coverage beyond the specific changes to improve overall code health)

Test: ATP tests passed http://ab/I82500010441880672
Bug: 431235865
Flag: TEST_ONLY



Change-Id: Idd70307209c04fab8b5158113fda18e88bdd8267