This adds an icon to the paired device details page which users can
click on to bring up a dialog for changing the display name for that
device.
We already had a dialog for changing the advertised name of the local
Bluetooth adapter that's used on the main Bluetooth settings page, so
I've made that abstract and created two new subclasses to encapsulate
the slight differences for this use case.
Bug: 62535241
Test: make RunSettingsRoboTests
Change-Id: I1c407f276e12aedf066a336e24b4ccd16d67c4df
