Update Room to 2.3.0.

app/build.gradle

@@ -102,7 +102,7 @@ ext {
     checkstyleVersion = '8.38'
 
     androidxLifecycleVersion = '2.2.0'
-    androidxRoomVersion = '2.3.0-alpha03'
+    androidxRoomVersion = '2.3.0'
 
     icepickVersion = '3.2.0'
     exoPlayerVersion = '2.13.3'

app/src/main/java/org/schabi/newpipe/database/Converters.kt

@@ -0,0 +1,52 @@
+package org.schabi.newpipe.database
+
+import androidx.room.TypeConverter
+import org.schabi.newpipe.extractor.stream.StreamType
+import org.schabi.newpipe.local.subscription.FeedGroupIcon
+import java.time.Instant
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
+
+object Converters {
+    /**
+     * Convert a long value to a [OffsetDateTime].
+     *
+     * @param value the long value
+     * @return the `OffsetDateTime`
+     */
+    @TypeConverter
+    fun offsetDateTimeFromTimestamp(value: Long?): OffsetDateTime? {
+        return value?.let { OffsetDateTime.ofInstant(Instant.ofEpochMilli(it), ZoneOffset.UTC) }
+    }
+
+    /**
+     * Convert a [OffsetDateTime] to a long value.
+     *
+     * @param offsetDateTime the `OffsetDateTime`
+     * @return the long value
+     */
+    @TypeConverter
+    fun offsetDateTimeToTimestamp(offsetDateTime: OffsetDateTime?): Long? {
+        return offsetDateTime?.withOffsetSameInstant(ZoneOffset.UTC)?.toInstant()?.toEpochMilli()
+    }
+
+    @TypeConverter
+    fun streamTypeOf(value: String): StreamType {
+        return StreamType.valueOf(value)
+    }
+
+    @TypeConverter
+    fun stringOf(streamType: StreamType): String {
+        return streamType.name
+    }
+
+    @TypeConverter
+    fun integerOf(feedGroupIcon: FeedGroupIcon): Int {
+        return feedGroupIcon.id
+    }
+
+    @TypeConverter
+    fun feedGroupIconOf(id: Int): FeedGroupIcon {
+        return FeedGroupIcon.values().first { it.id == id }
+    }
+}