Merge "Remove binderClearCallingIdentity()"

     * behavior of this API is changed such that passing {@code null} as the {@code admin} parameter

     * will return if any admin has blocked the uninstallation. Before L MR1, passing {@code null}

     * will cause a NullPointerException to be raised.

     * <p>

     * <strong>Note:</strong> If your app targets Android 11 (API level 30) or higher,

     * this method returns a filtered result. Learn more about how to

     * <a href="/training/basics/intents/package-visibility">manage package visibility</a>.

     *

     * @param admin The name of the admin component whose blocking policy will be checked, or

     *            {@code null} to check whether any admin has blocked the uninstallation.

     * @param packageName package to check.

     * @return true if uninstallation is blocked.

     * @return true if uninstallation is blocked and the given package is visible to you, false

     *         otherwise if uninstallation isn't blocked or the given package isn't visible to you.

     * @throws SecurityException if {@code admin} is not a device or profile owner.

     */

    public boolean isUninstallBlocked(@Nullable ComponentName admin, String packageName) {

                Preconditions.checkCallAuthorization(

                        isProfileOwner(caller) || isDeviceOwner(caller));

            }

            long id = mInjector.binderClearCallingIdentity();

            try {

                return mIPackageManager.getBlockUninstallForUser(packageName, userId);

            } catch (RemoteException re) {

                // Shouldn't happen.

                Slogf.e(LOG_TAG, "Failed to getBlockUninstallForUser", re);

            } finally {

                mInjector.binderRestoreCallingIdentity(id);

            }

        }

        return false;