Fix accessibility button footer preference did not announced correct by TalkBack

Root Cause: Description would be altered after displayPreference(), but getSummary() would be called after it.

Solution: Update title before displayPreference(), then it could be set correctly.

Fix: 192738520
Test: atest AccessibilityButtonFooterPreferenceControllerTest
Change-Id: I068994fca8202b166fedf43f9d9657b0c1a64c4e
3 files changed