fix: android opened metrics when app in background

[mrehan27]

closes: https://github.com/customerio/issues/issues/10211
blocked by release of: customerio/customerio-android#227

Changes

• Added activity callback to RNCIOPushMessaging
• Tracked opened event in onNewIntent for simple push using PushTrackingUtil when app is in background

[github-actions]

Pull request title looks good 👍!

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[Shahroz16]

Looks good

[levibostian]

I like the solution. Looks good