Revert "No more main thread SQL"

This reverts commit 4de891b459.

Async writes are a bad idea.

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

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

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

@@ -2,9 +2,6 @@ package be.mygod.vpnhotspot.room
 
 import androidx.lifecycle.LiveData
 import androidx.room.*
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
-import kotlinx.coroutines.async
 import kotlinx.coroutines.runBlocking
 
 @Entity
@@ -24,17 +21,13 @@ data class ClientRecord(@PrimaryKey
         abstract fun lookupSync(mac: Long): LiveData<ClientRecord>
 
         @Insert(onConflict = OnConflictStrategy.REPLACE)
-        protected abstract suspend fun updateInternal(value: ClientRecord): Long
-        suspend fun update(value: ClientRecord) = check(updateInternal(value) == value.mac)
+        protected abstract fun updateInternal(value: ClientRecord): Long
+        fun update(value: ClientRecord) = check(updateInternal(value) == value.mac)
 
         @Transaction
-        protected open fun upsertSync(mac: Long, operation: ClientRecord.() -> Unit) = runBlocking {
-            lookupOrDefault(mac).apply {
-                operation()
-                update(this)
-            }
+        open fun upsert(mac: Long, operation: ClientRecord.() -> Unit) = runBlocking { lookupOrDefault(mac) }.apply {
+            operation()
+            update(this)
         }
-        fun upsert(mac: Long, operation: ClientRecord.() -> Unit) =
-                GlobalScope.async(Dispatchers.IO) { upsertSync(mac, operation) }
     }
 }

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 suspend fun insertInternal(value: TrafficRecord): Long
-        suspend fun insert(value: TrafficRecord) {
+        protected abstract fun insertInternal(value: TrafficRecord): Long
+        fun insert(value: TrafficRecord) {
             check(value.id == null)
             value.id = insertInternal(value)
         }