Add js-java tests around *

Even '*' can be injected as valid js object name and used as window
property. This is a test to show that.

Bug: 918065
Change-Id: I1a91b658e1c6357a7b61197a487c848a1980b5b8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899183Reviewed-by: Shimi Zhang <ctzsm@chromium.org>
Commit-Queue: Changwan Ryu <changwan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712707}

android_webview/javatests/src/org/chromium/android_webview/test/JsJavaInteractionTest.java

@@ -821,6 +821,13 @@ public class JsJavaInteractionTest {
         checkInjectAndAccessJsObjectNameAsWindowProperty("123");
     }
 
+    @Test
+    @SmallTest
+    @Feature({"AndroidWebView", "JsJavaInteraction"})
+    public void testPostMessage_JsObjectName_Symbol() throws Throwable {
+        checkInjectAndAccessJsObjectNameAsWindowProperty("*");
+    }
+
     @Test
     @SmallTest
     @Feature({"AndroidWebView", "JsJavaInteraction"})