samsung730b: add Samsung 730B fingerprint sensor driver

Add support for the Samsung Electro-Mechanics 730B fingerprint sensor
(USB VID:PID 04e8:730b).

Sensor characteristics:
- Press (area) type sensor
- 112x96 pixel grayscale images
- ~500 DPI resolution
- Inverted polarity (light ridges on dark background)

Implementation details:
- USB protocol reverse-engineered from Windows driver traffic
- Images upscaled 2x to 224x192 for reliable NBIS minutiae detection
- Preprocessing pipeline: CLAHE + contrast stretching + unsharp mask
- Multi-frame capture with best-frame selection based on ROI quality
- bz3_threshold=25 provides balanced FAR/FRR for small images

Tested on real hardware with TAR ~87%.

Signed-off-by: Jang Han-gil <lignah1@icloud.com>

libfprint/meson.build

@@ -153,6 +153,8 @@ driver_sources = {
         [ 'drivers/realtek/realtek.c' ],
     'focaltech_moc' :
         [ 'drivers/focaltech_moc/focaltech_moc.c' ],
+    'samsung730b' :
+        [ 'drivers/samsung730b.c' ],
 }
 
 helper_sources = {

meson.build

@@ -144,6 +144,7 @@ default_drivers = [
     'fpcmoc',
     'realtek',
     'focaltech_moc',
+    'samsung730b',
 ]
 
 spi_drivers = [