Masakuni Oishi

Launch SendMessage coroutine with `CoroutineStart.UNDISPATCHED`.

1

Especially, this improves performance when the current dispatcher is `Dispatchers.Main`.

After upgrading AGP from 7.1.2 to 7.2.2, `gradlew connectedAndroidTest` fails with the following errors. ``` com.linecorp.lich.component.ActivityTest > activityLazy[Pixel_5_API_32(AVD) - 12] FAILED java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN...

In GitHub Actions, `:viewmodel-test-mockk:connectedDebugAndroidTest` crashes frequently with the following messages. ``` > Task :viewmodel-test-mockk:connectedDebugAndroidTest Starting 4 tests on test(AVD) - 10 com.linecorp.lich.viewmodel.test.mockk.MockingTest > mockViewModel[test(AVD) - 10] FAILED Test failed to...