WebView CTS: Assert default value for WebSettings#allowFileAccess

Uncomment the assert statement for the new default value for
WebSettings#allowFileAccess because a version of chrome/webview that has
the new default value change is dropped to master.

The min version that has the new defaulot value behaviour is 82.0.4061.0
and now the master has webview version of 82.0.4062.3.

Bug: 148840827
Test: atest CtsWebkitTestCases:WebSettingsTest
Change-Id: I6827011e9b5cd943ce9b0a1f4d032afecc2e2eb7
diff --git a/tests/tests/webkit/src/android/webkit/cts/WebSettingsTest.java b/tests/tests/webkit/src/android/webkit/cts/WebSettingsTest.java
index 7419858..94b2c1e 100644
--- a/tests/tests/webkit/src/android/webkit/cts/WebSettingsTest.java
+++ b/tests/tests/webkit/src/android/webkit/cts/WebSettingsTest.java
@@ -245,9 +245,7 @@
             return;
         }
 
-        // TODO(b/148840827): Uncomment default value assertion when a new version of WebView
-        // where the change happened is dropped in master.
-        // assertFalse("File access should be off by default", mSettings.getAllowFileAccess());
+        assertFalse("File access should be off by default", mSettings.getAllowFileAccess());
 
         mSettings.setAllowFileAccess(true);
         assertTrue("Explicitly setting file access to true should work",