refactor: update access modifiers for UserSettingRepositoryAndroidTest and MainActivityTest

Author: superus8r

app/src/androidTest/java/org/kabiri/android/usbterminal/MainActivityTest.kt

@@ -13,7 +13,7 @@ import org.junit.runner.RunWith
 
 
 @RunWith(AndroidJUnit4::class)
-class MainActivityTest {
+internal class MainActivityTest {
 
     @get:Rule
     var rule = activityScenarioRule<MainActivity>()

app/src/androidTest/java/org/kabiri/android/usbterminal/data/repository/UserSettingRepositoryAndroidTest.kt

@@ -20,7 +20,7 @@ import org.kabiri.android.usbterminal.model.UserSettingPreferences
 
 private const val TEST_DATA_STORE_NAME = "test_data_store"
 @RunWith(AndroidJUnit4::class)
-class UserSettingRepositoryAndroidTest {
+internal class UserSettingRepositoryAndroidTest {
 
     private val testCoroutineDispatcher: TestDispatcher = StandardTestDispatcher()
     private val testCoroutineScope = TestScope(testCoroutineDispatcher + Job())