Bump billingKtxVersion from 8.1.0 to 8.2.0 (#5998)

Bumps `billingKtxVersion` from 8.1.0 to 8.2.0.

Updates `com.android.billingclient:billing-ktx` from 8.1.0 to 8.2.0

Updates `com.android.billingclient:billing` from 8.1.0 to 8.2.0

---
updated-dependencies:
- dependency-name: com.android.billingclient:billing-ktx
  dependency-version: 8.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: com.android.billingclient:billing
  dependency-version: 8.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Crossle Song <[email protected]>

Author: dependabot[bot]

build.gradle

@@ -122,7 +122,7 @@ buildscript {
         ext.protobufVersion = '3.11.0'
         ext.appsFlyerVersion ='6.17.3'
         ext.installreferrerVersion ='2.2'
-        ext.billingVersion ='8.1.0'
+        ext.billingVersion ='8.2.0'
 
         ext.lottieComposeVersion = '6.7.1'
         ext.composeBomVersion = '2025.12.00'