release(4.2.0): bump versionName to 4.2.0 and versionCode to 218 (#1242)

* release(4.2.0): bump versionName to 4.2.0 and versionCode to 218

* docs(play-notes): add 4.2.0 production and beta release notes

* docs(release): document Polkadot stable2503 alignment in 4.2.0 notes

Author: WRRicht3r

app/src/main/play/release-notes/en-US/beta.txt

@@ -0,0 +1 @@
+TON features are now public. We’ve added Coinbase provider support, migrated WalletConnect to the Reown SDK, and introduced a new price service plus remote asset sync. This update also includes platform/toolchain upgrades required by Google Play and multiple stability/UX fixes (e.g., improved Ethereum recipient checks). Please try key flows (connect/sign, send/receive) and share feedback via Settings → Support.

app/src/main/play/release-notes/en-US/default.txt

@@ -0,0 +1 @@
+Fearless 4.2.0 brings public TON features, Coinbase provider integration, migration from WalletConnect to Reown SDK, and a new price service with remote asset sync. Includes platform/toolchain upgrades required by Google Play, stability and UX improvements, and CI hardening. Staged rollout is in progress — please report any issues via Settings → Support.

build.gradle

@@ -1,8 +1,8 @@
 buildscript {
     ext {
         // App version
-        versionName = '4.0.2'
-        versionCode = 217
+        versionName = '4.2.0'
+        versionCode = 218
 
         // SDK and tools
         compileSdkVersion = 35

docs/releases/4.2.0.md

@@ -25,3 +25,21 @@ Promote 4.2.0 from 4.2.0‑beta.1 with no functional changes. Stability verified
 - Create `4.2.x` patch branch if needed
 - Update `docs/status.md` and `docs/roadmap.md` to reflect current state
 
+## Polkadot stable2503 Alignment
+
+To align this release with Polkadot SDK stable2503 without code changes, set the following in `local.properties` (or as CI env vars):
+
+```
+TYPES_URL_OVERRIDE=https://cdn.jsdelivr.net/gh/soramitsu/shared-features-utils@polkadot-stable2503/chains/all_chains_types_android.json
+DEFAULT_V13_TYPES_URL_OVERRIDE=https://cdn.jsdelivr.net/gh/soramitsu/shared-features-utils@polkadot-stable2503/chains/default_v13_types.json
+CHAINS_URL_DEBUG_OVERRIDE=https://cdn.jsdelivr.net/gh/soramitsu/shared-features-utils@polkadot-stable2503/chains/v13/chains_dev_prod.json
+CHAINS_URL_RELEASE_OVERRIDE=https://cdn.jsdelivr.net/gh/soramitsu/shared-features-utils@polkadot-stable2503/chains/v13/chains.json
+# Optional: pin shared_features to a version compatible with stable2503
+SHARED_FEATURES_VERSION_OVERRIDE=1.x.y
+```
+
+Verify the effective alignment before running tests/builds:
+
+```
+./gradlew printPolkadotSdkAlignment
+```