If precac interface is in the middle of CAC, do not
entertain any CSA request coming as part of userspace/
country change/unsafe channel handling. Processing the
Channel change request in middle of CAC leads to teardown
of the SAP as SAP is in SAP_STOPPED state.
This leads to pre-cac failure.
To fix this, prevent CSA while CAC and once CAC is finished,
check the sanity of the operating channel based on
unsafe/disable channel list and move it to a valid channel.
Change-Id: I2757753a2a13bdaef60f9b9a46fcd569ddb7306c
CRs-Fixed: 3505593
5e69b2f7f7