[AndroidWebView] Add instrumentation test to catch StrictMode violations

components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java

Index: components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java
diff --git a/components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java b/components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java
index 11b7be2da65f77bd8c0f8a24b43e222162aba313..7af5bdc843cb14fa3a33525ddf703130aedbe927 100644
--- a/components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java
+++ b/components/policy/android/javatests/src/org/chromium/policy/test/annotations/Policies.java
@@ -134,8 +134,13 @@ public final class Policies {
     public static class RegistrationHook implements PreTestHook {
         @Override
         public void run(Context targetContext, Method testMethod) {
-            final Bundle policyBundle = PolicyData.asBundle(getPolicies(testMethod).values());
-            AbstractAppRestrictionsProvider.setTestRestrictions(policyBundle);
+            Map<String, PolicyData> policyMap = getPolicies(testMethod);
+            if (policyMap.isEmpty()) {
+                AbstractAppRestrictionsProvider.setTestRestrictions(null);
+            } else {
+                final Bundle policyBundle = PolicyData.asBundle(policyMap.values());
+                AbstractAppRestrictionsProvider.setTestRestrictions(policyBundle);
+            }
         }
     }
 }