Remove android:visibility attributes from Preferences

The android:visibility attribute is not applicable to Preferences and
does nothing.

Bug: 32692748
Test: None

Change-Id: I9aa6c3df824b61f96466cc7de6c046870a46678c
(cherry picked from commit 28a03aeb4854685fe30c334eea4f538da563a1e9)
1 file changed