fix(ad-hoc): (nAPM) Reset capture polling backoff when app returned to foreground - #393

Native APM capture polling improvements:

• Capture polling extracted from interactor and re-implemented in the separate class NativeAlternativePaymentCapturePoller, that also allows to reset polling backoff.
• Interactor observes when app returns to foreground and resets polling backoff.
• Fixed composable POCountdownTimerText that showed inaccurate countdown due to reliance on recompositions. Now it calculates the actual elapsed time.

Misc:

• Using SystemClock.elapsedRealtime() instead of System.currentTimeMillis() for better accuracy in all implementations that count time intervals.
• Related rename refactoring to improve code readability.