Ensure device does not use "allow hold" carrier config option.

This device predates the introduction of the "allow_hold_in_ims_call"
carrier config option, and it is undesirable to take away the functionality
associated with that carrier config valeu.  Setting this to "false" here
ensures that future releases for the device retains existing functionality.

Bug: 30449352
Change-Id: Idbb04bd0de64b21a0abaa8e37b6ec6078499c286
1 file changed