AppOps/Privacy Guard: Fix up misaligned switches.

Change-Id: Ic9e1e09ac911e552599f7bca6fb71b2808548f1d
Fix the icon size in app lists.

E.g. the "Select app" dialog in the profile group configuration uses
this layout to inflate the list dialog. However app icons can have
non-standard sizes so we enforce a consistent width and height.

Change-Id: I71731a9bb3548c699cc2e0e600a5ff371ceacbc3