[Autofill Assistant] Enable "new tab button" test

This test has been disabled for failing on tablet. Looking at other
sources testing the new tab button, they set a restriction to only
enable it for phones. This CL does the same to that test.

Bug: 1070272
Change-Id: I1c108391f0f4b5b31e2b8271392a998ed5266109
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2236440
Commit-Queue: Sandro Maggi <sandromaggi@google.com>
Reviewed-by: Clemens Arbesser <arbesser@google.com>
Cr-Commit-Position: refs/heads/master@{#776514}

chrome/android/features/autofill_assistant/javatests/src/org/chromium/chrome/browser/autofill_assistant/AutofillAssistantChromeTabIntegrationTest.java

@@ -41,7 +41,7 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import org.chromium.base.test.util.CommandLineFlags;
-import org.chromium.base.test.util.DisabledTest;
+import org.chromium.base.test.util.Restriction;
 import org.chromium.chrome.autofill_assistant.R;
 import org.chromium.chrome.browser.autofill_assistant.proto.ActionProto;
 import org.chromium.chrome.browser.autofill_assistant.proto.ChipProto;
@@ -62,6 +62,7 @@ import org.chromium.chrome.test.ChromeTabbedActivityTestRule;
 import org.chromium.chrome.test.util.ChromeTabUtils;
 import org.chromium.content_public.browser.test.util.TestThreadUtils;
 import org.chromium.net.test.EmbeddedTestServer;
+import org.chromium.ui.test.util.UiRestriction;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -112,7 +113,8 @@ public class AutofillAssistantChromeTabIntegrationTest {
 
     @Test
     @MediumTest
-    @DisabledTest(message = "https://crbug.com/1070272")
+    // Restricted to phones due to https://crbug.com/429671
+    @Restriction(UiRestriction.RESTRICTION_TYPE_PHONE)
     public void newTabButtonHidesAndRecoversAutofillAssistant() {
         ArrayList<ActionProto> list = new ArrayList<>();
         list.add((ActionProto) ActionProto.newBuilder()