Fingerprint unlock icon ugly in Android 16.1 (was fine in 16 before the Material Expressive change)

### 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:

Updated to Android 16.1 and the color that is inherited makes the fingerprint icon look amateurish. I've attached a picture of what it looks like on the lockscreen and then from KeePassDX 4.2.4. Lockscreen looks nice/professional. Can the inheritted colour be changed to one of the others that are taken from Material? I don't remember thinking "this looks amateur" for the yeara I was unlocking prior to 16.1 but I also don't have screenshots to compare.

Thanks.


### Describe what you expected to happen:

_No response_

### KeePassDX version:

4.2.4

### Build:

Libre

### Database version:

_No response_

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

_No response_

### Android version:

16.1

### Android device:

Pixel 9

### Additional context:

_No response_

No source file or test is identified in the report. First reproduce the fingerprint unlock screen on a Pixel 9 running Android 16.1 and compare it with the attached screenshots; done means the icon color matches the intended Material appearance without regressing older Android versions.

Written by the indexing model from the issue text.