modified settings to use settingslib class

LinkTextView is duplicated in various places in the
code base. The duplicate in settings has been removed
and the relevant classes have been updated to use the
one located in SettingsLib.

Test: robotests still pass
Bug: 34621372
Change-Id: I1d3cffb5e1960042fab752a47c0d842406468fd2
3 files changed