[BWA-193] Add item button does not close when tapping outside of it

### Steps To Reproduce

1. Go to 'main screen'
2. Click on 'Add item'
3. Tap in the app's top app bar

### Expected Result

Floating action button should close

### Actual Result

Floating action button remains open

### Screenshots or Videos

_No response_

### Additional Context

_No response_

### Build Version

2025.8.1 - 755

### What server are you connecting to?

EU

### Self-host Server Version

_No response_

### Environment Details

Device: Pixel 10 Pro
Android: 16

### Issue Tracking Info

- [x] I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

Reproduce the issue on the main screen using the listed build and device context, then search the Android project for the Add item floating action button and its outside-tap handling. Done means tapping the top app bar closes the button reliably, matching the expected result.

Written by the indexing model from the issue text.