recovery_refresh.te

Add check in order to fix possible integer underflow
during HDLC encoding which may lead to buffer
overflow. Also added check for packet length to
avoid buffer overflow.

Bug: 28767796
Change-Id: I6dfe890c9db521c9144f05155c50b289c83b5b8f
Signed-off-by: Mohit Aggarwal <maggarwa@codeaurora.org>
Signed-off-by: Yuan Lin <yualin@google.com>