Sell PRO as an in-app unlock, take shared photos, and let FX run negative

- One free Play app (com.locphamtran.recipescamera) with an expo-iap PRO
  unlock, replacing the paid apk for the store channel
- Android SEND/SEND_MULTIPLE share target feeds photos into the editor,
  on cold start and on resume
- BACK button in the TopBar and press-and-hold PEEK replace the chip row
- NOISE REDUCTION and SHARPENING accept -10: a negative SHARPENING softens
  the frame before the grain pass, a negative NOISE REDUCTION re-grains it,
  in the Skia engine, the live preview and the Kotlin export path alike

package.json

@@ -14,6 +14,7 @@
     "expo-file-system": "~57.0.1",
     "expo-font": "~57.0.1",
     "expo-haptics": "~57.0.1",
+    "expo-iap": "^5.6.0",
     "expo-keep-awake": "~57.0.1",
     "expo-location": "~57.0.4",
     "expo-media-library": "~57.0.2",