Use cid instead of attribute handle

Current API is defined as below
void BTA_GATTC_SendIndConfirm(uint16_t conn_id, uint16_t cid)

We need to use cid instead of attribute handle, otherwise when eatt is
enabled, something will happen

Bug: 159786353
Test: compile & make sure the cid is correctly sent to stack
Tag: #feature
Change-Id: If0cd9dd6783af7fefdb7af7130e5e9545188eecd