Prevent main thread queries

mobile/src/main/java/be/mygod/vpnhotspot/room/AppDatabase.kt

@@ -19,7 +19,6 @@ abstract class AppDatabase : RoomDatabase() {
                     .addMigrations(
                             Migration2
                     )
-                    .allowMainThreadQueries()
                     .build()
         }
     }

mobile/src/main/java/be/mygod/vpnhotspot/room/ClientRecord.kt

@@ -21,11 +21,11 @@ data class ClientRecord(@PrimaryKey
         abstract fun lookupSync(mac: Long): LiveData<ClientRecord>
 
         @Insert(onConflict = OnConflictStrategy.REPLACE)
-        protected abstract fun updateInternal(value: ClientRecord): Long
-        fun update(value: ClientRecord) = check(updateInternal(value) == value.mac)
+        protected abstract suspend fun updateInternal(value: ClientRecord): Long
+        suspend fun update(value: ClientRecord) = check(updateInternal(value) == value.mac)
 
         @Transaction
-        open fun upsert(mac: Long, operation: ClientRecord.() -> Unit) = runBlocking { lookupOrDefault(mac) }.apply {
+        open suspend fun upsert(mac: Long, operation: suspend ClientRecord.() -> Unit) = lookupOrDefault(mac).apply {
             operation()
             update(this)
         }

mobile/src/main/java/be/mygod/vpnhotspot/room/TrafficRecord.kt

@@ -41,8 +41,8 @@ data class TrafficRecord(
     @androidx.room.Dao
     abstract class Dao {
         @Insert
-        protected abstract fun insertInternal(value: TrafficRecord): Long
-        fun insert(value: TrafficRecord) {
+        protected abstract suspend fun insertInternal(value: TrafficRecord): Long
+        suspend fun insert(value: TrafficRecord) {
             check(value.id == null)
             value.id = insertInternal(value)
         }