Ship HDF EFFECT to PRO only, and clean the build for Play

Rename LIGHT GLOW to HDF EFFECT and gate it behind PRO: LITE renders the
chip greyed out with a PRO tag and cannot open its slider; restoration of
older settings that carry hdf > 0 still blocks export in LITE.

Play/licence pass:
- drop unused permissions (ACTIVITY_RECOGNITION, READ_MEDIA_AUDIO/VIDEO,
  SYSTEM_ALERT_WINDOW) and requestLegacyExternalStorage
- rename the Leica sims to LC STREETLIFE CLASSIC/VIVID, drop the brand from
  comments; fix app name text, canvaskit copyright, LICENSE owner
- remove expo-image-picker and expo-sensors (no JS import), delete dead
  exports (computeMatrixTint, cinemaSeasonName, base64 helpers,
  formatCoordinate)
- versionCode 3 / versionName 1.2.1, drop the personal email from About
- add docs/privacy-policy.html for the Play listing

Size: R8 + shrinkResources + bundle compression + ABI trim, 161 MB -> 76 MB.

src/components/Viewfinder.tsx

@@ -2797,7 +2797,7 @@ const Viewfinder = forwardRef<ViewfinderHandle, ViewfinderProps>(function Viewfi
   const cinemaOn = cinemaEffect != null && !!cinemaParams;
   const useShaderPass = !!imageFitRect && ((toneEffect != null && toneOn) || cinemaOn);
 
-  // ---- CLARITY + LIGHT GLOW on the LIBRARY preview -----------------------
+  // ---- CLARITY + HDF EFFECT on the LIBRARY preview -----------------------
   // The camera worklet and exportEngine both have these two passes; the three
   // library branches below draw the photo declaratively and had neither, so a
   // photo opened from the library ignored both knobs. Same maths as the camera: