Fix unique identifiers best practices links in device ID API docs

Bug: 168447060
Test: m docs
Change-Id: I483e0cf4915862254461200deb5d3dc7302bafb4
Merged-In: I483e0cf4915862254461200deb5d3dc7302bafb4
(cherry picked from commit 1aef206a3aadd0907204d3499882e1fd36790eeb)
2 files changed