Rename LeAddressManager#GetCurrentAddress()

There is misuse of this function since it's not clear whether it is the
initiator address, or the identity address. Renaming it should prevent
future misuse. The followup CL fixes the incorrect usage when possible.

We also rename GetAnotherAddress for similar reasons.

Bug: 268112598
Test: unit
(cherry picked from https://android-review.googlesource.com/q/commit:39d32583924b13763820eccd567a3736751363e0)
Merged-In: Ia5640c02a452670f7dae85e9c8c0c8099da8159f
Change-Id: Ia5640c02a452670f7dae85e9c8c0c8099da8159f
Bug:279962122