Allow non-required package verifiers

* Verifiers can be specified in the AndroidManifest.xml

* Those verifiers can respond to the new Intent action

* PackageManager API for those verifiers: verifyPendingInstall

Change-Id: I4892bce2e6984871e6e93c60a1ca0dae145f5df5
diff --git a/test-runner/src/android/test/mock/MockPackageManager.java b/test-runner/src/android/test/mock/MockPackageManager.java
index 3525abe..58680ea 100644
--- a/test-runner/src/android/test/mock/MockPackageManager.java
+++ b/test-runner/src/android/test/mock/MockPackageManager.java
@@ -36,9 +36,11 @@
 import android.content.pm.ProviderInfo;
 import android.content.pm.ResolveInfo;
 import android.content.pm.ServiceInfo;
+import android.content.pm.Signature;
 import android.content.pm.UserInfo;
 import android.content.pm.ManifestDigest;
 import android.content.pm.VerifierDeviceIdentity;
+import android.content.pm.VerifierInfo;
 import android.content.res.Resources;
 import android.content.res.XmlResourceParser;
 import android.graphics.drawable.Drawable;