Removing accessibility description from page indicators

The current page is announced upon switching to it.
Is should be done this way for all future page implementations with
indicators.

Bug: 77827828
Change-Id: I8ba3bd9d068954df51d6de45da79133ede12c96d
Test: Manual
Merged-In: I8f2f163a261dd7098939674d39e014236fc66d5d