Revert "Settings: Make Perf settings act just like dev setting - start hidden"

This reverts commit c06e11e730f481cb6516d1d5da2457f0a7f633a7.

Conflicts:
	src/com/android/settings/DeviceInfoSettings.java

Change-Id: I19c830f9b2c0a17996a45681f270bce60b11dd2a