Update API package and filter AA configs by platform (#11244)

src/ageAssurance/const.ts

@@ -4,13 +4,30 @@ import {
 } from '@atproto/api'
 
 import {AgeAssuranceAccess} from '#/ageAssurance/types'
-import {ANDROID_API_LEVEL, IOS_MAJOR_VERSION, IS_ANDROID, IS_IOS} from '#/env'
+import {
+  ANDROID_API_LEVEL,
+  IOS_MAJOR_VERSION,
+  IS_ANDROID,
+  IS_IOS,
+  IS_WEB,
+} from '#/env'
 
 /**
  * Minimum age required to access the app at all.
  */
 export const MIN_ACCESS_AGE = 13
 
+/**
+ * The identifier for the current platform, matching the `knownValues` of the
+ * `platforms` property on `app.bsky.ageassurance.defs#configRegion`. Used to
+ * filter out region configs that don't apply to this platform.
+ */
+export const AGE_ASSURANCE_PLATFORM: 'web' | 'ios' | 'android' = IS_WEB
+  ? 'web'
+  : IS_IOS
+    ? 'ios'
+    : 'android'
+
 /**
  * Whether the current device can provide the native on-device age signals we
  * use for age assurance (via `expo-age-range`). We gate on OS version because