UI refresh on bluetooth list page

- xml layout clean up
- add "Device name" preference, tapping will bring up rename dialog
- Remove tap target from original device_name pref

Merged-In: I6e9764dbb6c51f94be6d6a61d5a6401141407409
Change-Id: I9cb67cc557a9b932d7cf795a8d4a6fb5215c4365
Fix: 62890841
Fix: 62891178
Test: robotests