feat: [SDK-5397] send a heartbeat every 30 minutes of foreground time - #1773

feat: [SDK-5397] send a heartbeat every 30 minutes of foreground time#1773

fadi-george wants to merge 3 commits into

fadi/SDK-5391-ios-session-endOneSignal/OneSignal-iOS-SDK:fadi/SDK-5391-ios-session-endfrom

fadi/SDK-5397-ios-heartbeatOneSignal/OneSignal-iOS-SDK:fadi/SDK-5397-ios-heartbeatCopy head branch name to clipboard