Bug 1815872 - Test org.mozilla.geckoview.test.PdfCreationTest#saveAPdfDocument must only run on nightly r=geckoview-reviewers,ohall

Differential Revision: https://phabricator.services.mozilla.com/D169323

mobile/android/geckoview/src/androidTest/java/org/mozilla/geckoview/test/PdfCreationTest.kt

@@ -15,6 +15,7 @@ import androidx.test.filters.LargeTest
 import org.hamcrest.Matchers.equalTo
 import org.junit.After
 import org.junit.Assert.assertTrue
+import org.junit.Assume.assumeThat
 import org.junit.Before
 import org.junit.Rule
 import org.junit.Test
@@ -146,6 +147,8 @@ class PdfCreationTest : BaseSessionTest() {
     @NullDelegate(Autofill.Delegate::class)
     @Test
     fun saveAPdfDocument() {
+        assumeThat(sessionRule.env.isNightly, equalTo(true))
+
         activityRule.scenario.onActivity {
             mainSession.loadTestPath(HELLO_PDF_WORLD_PDF_PATH)
             mainSession.waitForPageStop()