Update some screenshot tests to be
@MediumTest

In order to verify more ui-material
components as part of presubmit,
change the test annotation from
@LargeTest to @MediumTest so that
they will run even when other modules
are changed as part of a CL:

Change-Id: Iccf102722eb036b712c7786624e93642ae8a8d6e
Fixes: 160625000
Test: this

diff --git a/ui/ui-material/src/androidTest/java/androidx/ui/material/CheckboxScreenshotTest.kt b/ui/ui-material/src/androidTest/java/androidx/ui/material/CheckboxScreenshotTest.kt
index 8b5e326..f10d795 100644
--- a/ui/ui-material/src/androidTest/java/androidx/ui/material/CheckboxScreenshotTest.kt
+++ b/ui/ui-material/src/androidTest/java/androidx/ui/material/CheckboxScreenshotTest.kt

@@ -17,7 +17,7 @@
 
 import android.os.Build
 import androidx.compose.state
-import androidx.test.filters.LargeTest
+import androidx.test.filters.MediumTest
 import androidx.test.filters.SdkSuppress
 import androidx.test.screenshot.AndroidXScreenshotTestRule
 import androidx.test.screenshot.assertAgainstGolden
@@ -43,7 +43,7 @@
 import org.junit.runner.RunWith
 import org.junit.runners.JUnit4
 
-@LargeTest
+@MediumTest
 @RunWith(JUnit4::class)
 @SdkSuppress(minSdkVersion = Build.VERSION_CODES.O)
 class CheckboxScreenshotTest {