Disables flaky test

Fixes: 270077464
Bug: 270371382
Test: atest ThemePickerTests
Change-Id: I24ecfe8e5c83235048863c51c07c8e7d5fff15d1
diff --git a/tests/src/com/android/customization/model/grid/ui/viewmodel/GridScreenViewModelTest.kt b/tests/src/com/android/customization/model/grid/ui/viewmodel/GridScreenViewModelTest.kt
index 951638a..7d0a527 100644
--- a/tests/src/com/android/customization/model/grid/ui/viewmodel/GridScreenViewModelTest.kt
+++ b/tests/src/com/android/customization/model/grid/ui/viewmodel/GridScreenViewModelTest.kt
@@ -31,6 +31,7 @@
 import kotlinx.coroutines.test.TestScope
 import kotlinx.coroutines.test.runTest
 import org.junit.Before
+import org.junit.Ignore
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.junit.runners.JUnit4
@@ -73,6 +74,7 @@
     }
 
     @Test
+    @Ignore("b/270371382")
     fun clickOnItem_itGetsSelected() =
         testScope.runTest {
             val optionItemsValueProvider = collectLastValue(underTest.optionItems)