Re-implement iOS native plugin (+ minor features)

[orkun1675]

This XXL PR achieves the following:

• [iOS] Ensures background (headless) Flutter engine is created once and re-used when possible
• Fixes equality implementation of the new AlarmSet class used by scheduled and ringing streams
• [iOS] Re-introduces the iOSTimers that are a fallback mechanism incase native->Flutter communication breaks down
• [iOS] Fixes incompatability with other notification plugins such as flutter_local_notifications
• [iOS] Re-structures and re-writes the entire iOS plugin using declarative services to be easier to maintain & bug free
• [Android & iOS] Disables the warning notification after the alarm starts ringing
• [Android & iOS] Turns off the alarm if the app is force quit while the alarm is ringing
• [iOS] Resolves race conditions
• [iOS] Bumps iOS SDK dependency to 13+
• Upgrades deps

Missing pieces include:

• iOS error handling: right now errors that occur in services/managers are swallowed and the Flutter side is not informed
• Comprehensive testing

[wayupdev]

Hello guys,

Any news on this PR ?

[wayupdev]

Hello,

I tested the PR in prod and I have these issues:

Fatal Exception: android.app.RemoteServiceException$ForegroundServiceDidNotStartInTimeException: Context.startForegroundService() did not then call Service.startForeground(): ServiceRecord{fd785c9 u0 com.wayup.way_up/com.gdelataillade.alarm.alarm.AlarmService}
at android.app.ActivityThread.generateForegroundServiceDidNotStartInTimeException(ActivityThread.java:2323)
at android.app.ActivityThread.throwRemoteServiceException(ActivityThread.java:2294)
at android.app.ActivityThread.-$$Nest$mthrowRemoteServiceException()
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2619)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:230)
at android.os.Looper.loop(Looper.java:319)
at android.app.ActivityThread.main(ActivityThread.java:9063)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:588)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)

      Fatal Exception: android.app.ForegroundServiceDidNotStartInTimeException: Context.startForegroundService() did not then call Service.startForeground(): ServiceRecord{f2de671 u0 com.wayup.way_up/com.gdelataillade.alarm.alarm.AlarmService}
   at android.app.ActivityThread.throwRemoteServiceException(ActivityThread.java:1960)
   at android.app.ActivityThread.access$2800(ActivityThread.java:253)
   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2185)
   at android.os.Handler.dispatchMessage(Handler.java:106)
   at android.os.Looper.loopOnce(Looper.java:201)
   at android.os.Looper.loop(Looper.java:288)
   at android.app.ActivityThread.main(ActivityThread.java:7886)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:568)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1045)

[wayupdev]

On the iOS side, the alarm sounds fine and I no longer have any crashes. The only downside is the notifications issue: I still can't use a payload on my notifications when the package is active.

@orkun1675 Congratulations on the PR work!

[orkun1675]

Merging this PR. @wayupdev can you please create bugs for the two issues you mentioned?