Add support for android 12

Need to change pending intent flag

2022-03-16 14:04:48.410 11177-11177/com.sellnu.frekis E/Mbgl-Mapbox: Error occurred while initializing telemetry
java.lang.IllegalArgumentException: com.sellnu.frekis: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
at android.app.PendingIntent.checkFlags(PendingIntent.java:375)
at android.app.PendingIntent.getBroadcastAsUser(PendingIntent.java:645)
at android.app.PendingIntent.getBroadcast(PendingIntent.java:632)
at com.mapbox.android.telemetry.AlarmSchedulerFlusher.register(AlarmSchedulerFlusher.java:31)
at com.mapbox.android.telemetry.MapboxTelemetry.startAlarm(MapboxTelemetry.java:375)
at com.mapbox.android.telemetry.MapboxTelemetry.startTelemetry(MapboxTelemetry.java:369)
at com.mapbox.android.telemetry.MapboxTelemetry.enable(MapboxTelemetry.java:113)
at com.mapbox.mapboxsdk.module.telemetry.TelemetryImpl.(TelemetryImpl.java:33)
at com.mapbox.mapboxsdk.ModuleProviderImpl.obtainTelemetry(ModuleProviderImpl.java:22)
at com.mapbox.mapboxsdk.Mapbox.initializeTelemetry(Mapbox.java:167)
at com.mapbox.mapboxsdk.Mapbox.getInstance(Mapbox.java:64)
at com.sellnu.frekis.mapbox.MapBoxManager.(MapBoxManager.java:35)
at com.sellnu.frekis.mapbox.MapBoxManager.init(MapBoxManager.java:40)

Comienza con AlarmSchedulerFlusher.java en la línea 31, donde el stack trace muestra que PendingIntent.getBroadcast falla en Android 12. Actualiza el manejo de los flags del pending intent para el requisito de API indicado, luego ejecuta las pruebas relevantes de telemetría de Android o del plugin y confirma que la inicialización se realiza correctamente al apuntar a Android 12.