Fix issue where host shows up as a conference participant.

- Added verbose debug logs to have better visibility as to what is
being compared (in case this fix doesn't work).
- Changed to using PhoneNumberUtils.compare, which will strip out any
special characters such as +, -, etc when performing the number comparison.

Bug: 23691306
Change-Id: I68ed5cea5a65c44e8f8bc2518dd02c29a9149540
1 file changed