Android 15 not popping up as password manager.

### Checks

- [x] I have read the Wiki, searched the open issues, and still think this is a new bug.

### Explain the problem clearly and succinctly:

On android 11 it worked reasonably well, on Android 15 on a pixel phone, google password manager keeps coming up.

### Describe what you expected to happen:

Keeppassdx should popup on authentication fields.

### KeePassDX version:

4.5.3

### Build:

Free

### Database version:

v2

### File provider (`content://` URI)

_No response_

### Android version:

15

### Android device:

Pixel 9 pro

### Additional context:

I have set keepassdx as the autofill/passkey and credential manager in android settings, no additional password manager is enabled, which makes the fact google is popping up even more strange as that is disabled.

Start by reproducing the issue on a Pixel 9 Pro running Android 15 with KeePassDX 4.5.3, then inspect the autofill, passkey, and credential-manager integration described in the report. Done means KeePassDX appears on authentication fields instead of Google Password Manager when it is configured as the active provider.

Written by the indexing model from the issue text.