speech: On-device recognition settings profile selector

`Settings > System > Languages > On-device speech recognition`
entry is currently proceeding to the settings page for the personal
profile by default. If a work profile exists,
a profile selector should be shown first.

Bug: 269575714
Test: Manual, already existing robotests
Change-Id: Id95a9716358ec3a813c77275bd65f0cbdfc9aefc