Add rotation support to launch animations

This only adds support for launch animations. Recents
requires some auxiliar work.

Adds a rotation parameter to the animation targets that
only gets used by shell transitions. If this is non-zero,
launcher will transform it's coordinates relative to that
provide rotation.

Bug: 179308296
Test: Launch and exit apps with different orientation from
      default (portrait).
Change-Id: I7b52cbd37432bcd43e7155bcb07b30cc65c43186