Allow Instant Apps to call getPermissionControllerPackageName

This is needed for requesting permissions to work.

Bug: 62791664
Test: Requesting a runtime permission doesn't crash the app
Change-Id: If18ac8e4c903f3804ec24df39d169fa9145f449e

services/core/java/com/android/server/pm/PackageManagerService.java

@@ -4968,9 +4968,6 @@ public class PackageManagerService extends IPackageManager.Stub
 
     @Override
     public String getPermissionControllerPackageName() {
-        if (getInstantAppPackageName(Binder.getCallingUid()) != null) {
-            throw new SecurityException("Instant applications don't have access to this method");
-        }
         synchronized (mPackages) {
             return mRequiredInstallerPackage;
         }