Move HIDE_VOICEMAIL_SETTINGS_MENU out of voicemail/impl

The metadata belongs with the voicemail settings menu, which is moved into dialer a while ago. Not moving the metadata causes build variants without VVM to have duplicated voicemail settings in telephony and dialer.

Also removed the redundant metadata in incall ui manifest.

Bug: 73096806
Test: manual
PiperOrigin-RevId: 188756468
Change-Id: I00174f84024c5b9ab809d99e40a55d22a07bd063