DO NOT MERGE: AdapterService: Check the PIN code length before using

The length is assigned by the framework. We should be better to check
again before using, and dropped any unexcepted input.

Bug: 139287605
Test: PoC
Change-Id: Ie2dd01e0b192e7ed1fe4b464618ddfa415dbf15c
(cherry picked from commit 3d7549de501ec15f973ff176435c07de018643b5)
1 file changed