1. Rename getNetworkPrefixLength to getPrefixLength. Update all
callers in frameworks/base and add a shim method and a TODO
for the rest.
2. @hide isSameAddressAs. It doesn't add much, and it's just
one-liner that callers can implement if they want.
3. Fix the alignment of the initial paragraph (<ul> should have
been </ul>).
4. Remove the documentation that talks about creating
LinkAddresses, since there's no public API for creating them.
With these changes I think LinkAddress is fine as a public API.
Bug: 15142362
Change-Id: Iaf3b1db577745bb68a9e1dd7f96d666dd3f3ec7c
(cherry picked from commit 9ab53650cfcd91a2a151b44b3fd1381841f76269)
00a0fd650b