Fix payload size for GATT Read by type request

Payload size for GATT Read by type request for UUID32 and UUID128
are incorrectly allocated. This leads to memory overflow when
Read by type request is sent for them and eventually results
in crash during free. This change makes sure that the payload
can accomodate upto 128 bit UUID.

This crash is observed while running TC_GAR_CL_BV_03_C Qual test
case.

Bug: 29011042
Change-Id: Ib2b41b769b394670099f4549f204e2972f7df876