Add support for EINTR in BT

During normal operation, it's common on a multi-core device to get
EINTR. This is especially noticable during a bugreport where several
services get EINTR even though it's not fatal.

This change adds TEMP_FAILURE_RETRY around the system calls that can
receive EINTR where a retry should happen.

Change-Id: If13d24f57c587392f57961fe2caf46e2a6fa843e