Bluetooth: Avoid re-authentication for secure high connections

The re-authentication code changes are added to mandate 16 digit
PIN Key for SECURE_HIGH connections. But only SAP profile needs
16 digit key, not all the profiles that register with SECURITY
HIGH. Avoid the code to mandate 16 digit key.

Change-Id: Iffc02841e52b8c0b2f6e2495b27df26869e72999
Signed-off-by: Srinivas Krovvidi <skrovvid@codeaurora.org>
Signed-off-by: Ram Mohan Korukonda <rkorukon@codeaurora.org>
Signed-off-by: Mallikarjuna GB <gbmalli@codeaurora.org>