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.

android/gradle.properties

@@ -29,7 +29,7 @@ android.enablePngCrunchInReleaseBuilds=true
 # Use this property to specify which architecture you want to build.
 # You can also override it from the CLI using
 # ./gradlew <task> -PreactNativeArchitectures=x86_64
-reactNativeArchitectures=armeabi-v7a,arm64-v8a,x86,x86_64
+reactNativeArchitectures=armeabi-v7a,arm64-v8a
 
 # Use this property to enable support to the new architecture.
 # This will allow you to use TurboModules and the Fabric render in
@@ -61,4 +61,10 @@ EX_DEV_CLIENT_NETWORK_INSPECTOR=true
 # Use legacy packaging to compress native libraries in the resulting APK.
 expo.useLegacyPackaging=false
 
-expo.inlineModules.watchedDirectories=[]
+expo.inlineModules.watchedDirectories=[]
+
+# Shrink the shipped APK: R8 strips unused Java/Kotlin, shrinkResources drops
+# unreferenced resources, bundle compression gzips the embedded JS bundle.
+android.enableMinifyInReleaseBuilds=true
+android.enableShrinkResourcesInReleaseBuilds=true
+android.enableBundleCompression=true