Remove Modifier transformations (1/2)

This CL removes the ModifierTransformation interface. This interface was
only implement by PunchHole, which is now replaced by Modifier.punchHole
that can be called directly from user code.

There were 2 main reasons for this removal, which are both performance
reasons:

 - This removes the modifierTransformations() chain applied in
   http://shortn/_9vgJ2a7Yx6. With this removed and once b/311132415 is
   fixed, we will be able to make Modifier.element() be a single
   ModifierNodeElement.

 - modifierTransformations() was reading the current transition state in
   http://shortn/_EAjP93YKeQ, which means that *all elements* always
   recompose whenever the transition state has changed, just because of
   that PunchHole transformation.

Test: PunchHoleTest
Test: Manual, in the gallery app by going from Lockscreen <=> Shade
Bug: 291071158
Flag: NA
Change-Id: I45e71dce8acb98318ac61127bd5294f0a7053dda