[Wi-Fi] EAP method AKA' did not pronounced as AKA prime.

Spinner did not use ttsspan to store the display string so AKA' just
pronounced as AKA.

To fix it, use charsequence array, which each specific array item have
the ttsSpan to store the string for TTS engine.

Bug: 119929832
Test: Set a 3-texts array and check if the specific array item
replacement mechanism work correctly or not.

Change-Id: I8e7d10da99a3f3503e1019687c45cf40070d0045