Move Android instrumented test `ThemeTest` to unit test

core/designsystem/build.gradle.kts

@@ -42,5 +42,5 @@ dependencies {
     implementation(libs.androidx.core.ktx)
     implementation(libs.coil.kt.compose)
 
-    androidTestImplementation(projects.core.testing)
+    testImplementation(libs.androidx.compose.ui.testManifest)
 }

core/designsystem/src/test/kotlin/com/google/samples/apps/nowinandroid/core/designsystem/ThemeTest.kt

@@ -43,6 +43,9 @@ import com.google.samples.apps.nowinandroid.core.designsystem.theme.NiaTheme
 import com.google.samples.apps.nowinandroid.core.designsystem.theme.TintTheme
 import org.junit.Rule
 import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
 import kotlin.test.assertEquals
 
 /**
@@ -53,6 +56,8 @@ import kotlin.test.assertEquals
  * [LocalBackgroundTheme] — have the expected values for a given theme mode, as specified by the
  * design system.
  */
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [33])
 class ThemeTest {
 
     @get:Rule