Fix for auto subscribe enabled in main app

[VGJohn]

Description

Auto subscribe is enabled in the main app since the default return value from the settings preferences is set to true instead of false. From some comments I've seen, auto subscribe is only meant to be enabled in the automotive app.

Fixes #544

Testing Instructions

1. Open the discover tab and click on any random podcast you aren't subscribed to
2. Play an episode
3. Go back to the podcasts list, and you will notice you are now subscribed to the podcast

Checklist

• If this is a user-facing change, I have added an entry in CHANGELOG.md
• I have considered whether it makes sense to add tests for my changes
• All strings that need to be localized are in modules/services/localization/src/main/res/values/strings.xml
• Any jetpack compose components I added or changed are covered by compose previews

[ashiagr]

I can confirm this fixes the issue, thank you so much @VGJohn! 🙏
I'll cherry-pick it into a new beta build in a separate PR.

[ashiagr]

This is included in a new beta 7.26-rc-4.

[CookieyedCodes]

In my opinion it wouldn't be a bad toggle in settings to enable this 🤔, obviously off by default though