Fix status icon animations

Hidden -> icon: animate alpha
Icon -> hidden: disappear
Other transitions: animate translation, size, alpha (whichever is
changing)

When visibility is not changing, but translation is, animate
translationX so icons don't jump around. Now there shouldn't be any
jumping and icons won't fly in from the left sometimes.

Test: visual
Change-Id: I2bc192959e950b0887dc0b38f669ca36cff3a732
Fixes: 109869537