fix(android): pairing QR now actually scannable

Camera decode failed because every lever was at its minimum: the web
modal generated the QR at 112px (~2.5px per module before upscaling),
the analysis stream was CameraX's 640x480 default, and ZXing ran
without TRY_HARDER. Generate the QR at 512px (displayed 192px with a
real quiet zone), analyze at 1280x720, decode with TRY_HARDER plus an
inverted-luminance fallback. v0.4.14 (versionCode 18).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Android/app/build.gradle.kts

@@ -11,8 +11,8 @@ android {
         applicationId = "com.archipelago.app"
         minSdk = 26
         targetSdk = 35
-        versionCode = 17
-        versionName = "0.4.13"
+        versionCode = 18
+        versionName = "0.4.14"
 
         vectorDrawables {
             useSupportLibrary = true