Move service to common resources

mirai-core-api/src/jvmMain/kotlin/findMiraiInstance.kt

@@ -14,5 +14,5 @@ import java.util.*
 @JvmSynthetic
 internal actual fun findMiraiInstance(): IMirai {
     return ServiceLoader.load(IMirai::class.java).firstOrNull()
-        ?: Class.forName("net.mamoe.mirai.internal.MiraiImpl").kotlin.objectInstance as IMirai
+        ?: Class.forName("net.mamoe.mirai.internal.MiraiImpl\$INSTANCE").kotlin.objectInstance as IMirai
 }

mirai-core/src/jvmTest/kotlin/ContentEqualsTest.kt

@@ -6,6 +6,7 @@
  *
  *  https://github.com/mamoe/mirai/blob/master/LICENSE
  */
+
 package net.mamoe.mirai.internal
 
 import net.mamoe.mirai.message.data.ConstrainSingle