Only one CSIP earbud connected after pairing

Steps to reproduce: |-
1. Turn on BT
2. DUT pair/connect with remote buds

Repro rate:  10/10 times

Expected result: Both earbuds paired and connected

Observed result: only one earbud getting connected

Root cuase: For the second earbud the SIRK verification was not happening successfully
            as remote not able to handle GATT_READ_BY_TYPE

Fix:  Allow IOT devices to use GATT_READ_CHAR_VALUE instead of GATT_READ_BY_TYPE

Test: m -j
bug: 383695743
Flag: EXEMPT interop fix

Change-Id: I81dae7b91f4ff691957765759d023c98e82a7024