Frameworks: fix navbar and pie icons for tablets and RTL

well due that we use a completly other attempt then googles navbar we do not
need to rely on different sized icons for portrait and landscape. So just a square
icon fits our needs perfect (which is so or so everwhere in AOSP default to use square ones).

Whatever recents pie feature showed us that we still forgot to size the pictures for our tablets
and as well for RTL user.

So let us do it now to fix any resizing issues on navbar and or SlimPie

Change-Id: I5257b789a5450754a296141b0af63d2eacaa87c9