Fix: Android AppIntentsPlugin now handles iOS-only cache methods
(getCachedValue/setCachedValue/clearCachedValue/configureStorage/
processPendingActions) as no-ops returning null, instead of throwing
MissingPluginException. Prevents silent failures in release builds
where PlatformDispatcher.onError swallows the exception (#22).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>