Improving Automotive search

[geekygecko]

Description

This change improves the Automotive search. One of our partners has reported search issues. The previous search was based on our voice search which I don't believe works well in this use case.

Fixes #663
Fixes #664

Testing Instructions

1. Deploy the Automotive module to an Automotive emulator
2. Tap the search icon (next to the settings cog)
3. Search for 'Tech News'
4. Scroll down to 'Daily Tech News Show'
5. Tap the row
6. Tap the first episode
7. Pause the episode, close the player, tap the back button twice
8. ✅ Verify on the 'Podcasts' tab that the podcast 'Daily Tech News Show' is listed (on Automotive by default, you are subscribed to podcasts)
9. Tap the search icon again
10. Clear the search text
11. Search for 'Tech News'
12. ✅ Verify the top result is now 'Daily Tech News Show' (your subscribed to podcasts should appear first)
13. Clear the search
14. Tap on the wifi icon in the status bar
15. Turn off mobile and wifi data
16. Search for 'Material'
17. ✅ Verify the error message 'Something went wrong' is displayed. (Unfortunately I couldn't find a way to add a custom error message)

Screenshot

[ashiagr]

Works as described! Thank you for these improvements, @geekygecko