Fix Android deep link push notifications causing app restart in foreground

[imSzukala]

When the app is in the foreground and receives an Intercom push notification with a deep link, the app was unexpectedly restarting (showing splash screen) before navigating to the deep link destination.

Root cause:

• TaskStackBuilder is designed to create a synthetic back stack and calls startActivities() internally - Android treats it as creating a new task stack
• With singleTask launch mode, Android's behaviour is to destroy the existing instance and create a new one when startActivities() is called

Solution:

• Added isAppInForeground() helper method to detect app state
• Only add launch intent to TaskStackBuilder when app is in background/killed
• When app is in foreground, use empty TaskStackBuilder for direct navigation

before:

Screen_recording_20260216_160250.webm

after:

Screen_recording_20260216_160852.webm