Revert workaround for broken docs link and fix properly

Reverts the change to com.ibm.icu.text.UnicodeFilter and
provides replacement text for the documentation of the class
that is used when repackaging.

Bug: 22023363
(cherry picked from 71a3637d1986b2444d947a9eabdd01af51f6141d)

Change-Id: I2d478e8cf4d3454aaa46604c9516ba0cd104c6e2
3 files changed