clear Google sync queue if google sync is turned off

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/Config.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.media.RingtoneManager
 import android.text.format.DateFormat
 import com.simplemobiletools.calendar.R
+import com.simplemobiletools.calendar.extensions.googleSyncQueue
 import com.simplemobiletools.calendar.extensions.scheduleGoogleSync
 import com.simplemobiletools.commons.helpers.BaseConfig
 import java.util.*
@@ -75,6 +76,9 @@ class Config(context: Context) : BaseConfig(context) {
         get() = prefs.getBoolean(GOOGLE_SYNC, false)
         set(googleSync) {
             context.scheduleGoogleSync(googleSync)
+            if (!googleSync)
+                context.googleSyncQueue.clearQueue()
+
             prefs.edit().putBoolean(GOOGLE_SYNC, googleSync).apply()
         }
 

app/src/main/kotlin/com/simplemobiletools/calendar/helpers/GoogleSyncQueueDB.kt

@@ -71,4 +71,8 @@ class GoogleSyncQueueDB private constructor(val context: Context) : SQLiteOpenHe
         val selection = "$COL_EVENT_ID = $eventId"
         mDb.delete(OPERATIONS_TABLE_NAME, selection, null)
     }
+
+    fun clearQueue() {
+        mDb.delete(OPERATIONS_TABLE_NAME, null, null)
+    }
 }