Solve the problem of unable to install persistent app through adb install

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

//注释掉以下的校验，或者添加白名单去管理

 // Prevent persistent apps from being updated
 /*if ((oldPackage.applicationInfo.flags & ApplicationInfo.FLAG_PERSISTENT) != 0) {
     res.setError(PackageManager.INSTALL_FAILED_INVALID_APK,
             "Package " + oldPackage.packageName + " is a persistent app. "
                     + "Persistent apps are not updateable.");
     return;
 }*/