chore: upgrade Example app to React Native 0.86.2, and fix the Android library build for AGP 8

[octavianduminicaconnatix]

What does this Pull Request do?

Why

The Example app no longer compiled on Xcode 26. fmt 11.0.2 — pinned by React Native
0.78.1 — fails clang 21's stricter C++20 consteval rules, so the build died inside a
dependency before it ever reached wrapper code. Since the Example app is the only way to
manually verify this library, that left it unverifiable on current tooling.

RN 0.86 ships ReactNativeDependencies as a prebuilt binary, so fmt is no longer
compiled from source at all and the failure disappears rather than being patched around.

Bringing the Example app up to 0.86.2 also surfaced several ways the Android library
module had fallen behind modern AGP and RN. Those fixes are the part of this PR that
matters to anyone consuming this package.

Does this affect consumers?

Yes — two files in android/ are consumer-facing. Everything else is under
Example/ and is development-only.

Change	Why
Added namespace 'com.jwplayer.rnjwplayer'; removed package= from AndroidManifest.xml	AGP 8 requires namespace and rejects the manifest package attribute. This is the fix for Namespace not specified build failures.
com.facebook.react:react-native:+ → com.facebook.react:react-android	The old coordinate doesn't exist for RN 0.71+.
Removed the $rootDir/../node_modules/react-native/android Maven repo	That directory no longer exists — RN publishes to Maven Central now.
Added buildFeatures { buildConfig true }	AGP 8 makes BuildConfig generation opt-in, and this module emits USE_IMA / USE_CAST / IS_NEW_ARCHITECTURE_ENABLED.
compileSdkVersion → compileSdk, lintOptions → lint	Renamed in AGP 8.
Removed a stale classpath 'com.android.tools.build:gradle:3.4.2' buildscript block	Dead config from 2019; the consuming project's AGP is what applies.
Fallback SDK levels raised: minSdkVersion 16 → 24, compile/targetSdkVersion 28 → 36	These are only safeExtGet defaults, used when the consuming app doesn't set them. Any modern RN app defines its own, and RN itself hasn't supported minSdk 16 for years.

No public API, JS, or TypeScript changes. No behavioural change to the player.

What changed in the Example app

Followed the official rn-diff-purge 0.78.1..0.86.2 diff
that backs the RN Upgrade Helper, then fixed what the template diff doesn't cover.

JS / tooling — react-native 0.78.1 → 0.86.2, react 19.0.0 → 19.2.3, CLI 15 → 20,
@react-native/* → 0.86.2 (+ jest-preset), native deps bumped (screens 4.26.2,
safe-area-context 5.8.0, gesture-handler 3.1.0, bootsplash 7.3.2, device-info 15.0.2,
vector-icons 10.3.0), engines.node → >= 22.11.0, plus the template's jest,
tsconfig, prettier and Gemfile changes.

iOS — AppDelegate migrated from subclassing RCTAppDelegate to
UIResponder + RCTReactNativeFactory + ReactNativeDelegate, preserving the
GoogleCast setup and moving RNBootSplash into customize(). Podfile platform pinned to
iOS 15.6 (RN's min_ios_version_supported is lower than RNJWPlayer.podspec's 15.6,
which produced a CocoaPods platform-compatibility warning).

Android — Gradle 8.12 → 9.3.1 (wrapper regenerated), buildTools/targetSdk →
36, Kotlin 2.0.21 → 2.1.20, MainApplication simplified to loadReactNative() +
getDefaultReactHost(context, packageList), usesCleartextTraffic manifest placeholder
(and the debug manifest it supersedes removed), edgeToEdgeEnabled=false.

Two changes the template diff couldn't tell us about:

• MainActivity isn't in the RN diff (the template's copy didn't change), but it
  broke anyway with 'loadApp' overrides nothing — RNBootSplash 7 replaced its Android
  integration. Splash init moves into onCreate before super, with
  RNScreensFragmentFactory as required when using react-native-screens.
• Splash theme migration (values/styles.xml + new values-v31/styles.xml).
  RNBootSplash 7 renamed its theme attributes (bootSplashBackground / bootSplashLogo /
  postBootSplashTheme), so the old theme silently configured nothing. A values-v31
  variant is required — with the theme only in values/, the platform splash screen on
  API 31+ doesn't pick the attributes up at all.

Deliberately not taken from the template

• The Info.plist orientation change, which makes iPhone portrait-only — this app needs
  landscape for fullscreen playback.
• App.tsx, which is the template's demo screen; this app has its own.

Local environment requirements

Worth knowing before you build — these cost real time to work out:

• Use JDK 17 for Gradle. Android Studio 2026.1 bundles JBR 25, and on JDK 25 the
  build fails at :app:configureCMakeDebug with
  WARNING: A restricted method in java.lang.System has been called. That's JDK 24+'s
  JEP 472 warning; AGP 8.12's prefab step treats any
  subprocess stderr line as fatal. Set Gradle JDK → 17 (Settings → Build, Execution,
  Deployment → Build Tools → Gradle). Verified: JDK 17 passes, JDK 25 fails.

Known issues and follow-ups

• Splash (Android, API 31+): RNBootSplash.init is intentionally not called. On
  API 31+ its post-system-splash view draws a large black ring instead of the logo, and it
  does not resolve ?bootSplashLogo from the theme — verified with three different logo
  assets, and bootSplashBackground has no effect on it either. The platform splash screen
  shows the branded logo, and the window is painted with the splash background so the gap
  before React's first render is white rather than black. Verified by sampling six frames
  across the whole splash: no black pixels in any of them. The dependency is kept — iOS
  uses it successfully, and BootTheme inherits Theme.BootSplash from it. Worth an
  upstream issue; if fixed, re-enabling one line restores a logo for the whole splash.

Not included

No JW SDK version changes — JWPlayerKit and the Android JW SDK pins are untouched. This
PR is only the React Native upgrade plus the Android library compatibility fixes.