Revert "Disable AppOps for real."

This reverts commit 64b28a0dcc174827e551f4c7e71e4268bd0f5bba.
Settings: Bring back app ops

Google didn't expose app ops yet, but we want to.  Places the app ops fragment
under the System header in settings

Thanks @BigBrother1984 for the drawables

ps2: fix indents
ps3: really fix indents
ps4: fix parentActivity key name

Change-Id: I09ec8c0b6d3b681f6b008d140a93f8112814228a
Signed-off-by: Evan Anderson <evan1124@gmail.com>

Conflicts:
	res/values/mintkat_strings.xml