rk3288阻止卸载普通应用在Android 7.1

    diff --git a/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java b/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java
    index 728cca4..702c240 100755
    --- a/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java
    +++ b/frameworks/base/services/core/java/com/android/server/pm/PackageManagerService.java
    方法：deletePackageAsUser
    @@ -15775,8 +15775,20 @@ public class PackageManagerService extends IPackageManager.Stub {
     @Override
     public void deletePackageAsUser(String packag